foobar

Cachix has renamed their project.

.github/workflows/test.yml

@@ -1,17 +0,0 @@
-name: "Test"
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-  schedule:
-    - cron: '42 7 * * *'
-jobs:
-  tests:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install Nix
-        uses: cachix/install-nix-action@v30
-      - name: Execute unit tests
-        run: nix flake check

flake.lock

@@ -1,20 +1,5 @@
 {
   "nodes": {
-    "crane": {
-      "locked": {
-        "lastModified": 1748047550,
-        "narHash": "sha256-t0qLLqb4C1rdtiY8IFRH5KIapTY/n3Lqt57AmxEv9mk=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "b718a78696060df6280196a6f992d04c87a16aef",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -38,11 +23,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1743550720,
+        "lastModified": 1730504689,
-        "narHash": "sha256-hIshGgKZCgWh6AYJpJmRgFdR3WUbkY04o82X05xqQiY=",
+        "narHash": "sha256-hgmguH29K2fvs9szpq2r3pz2/8cJd2LPS+b4tfNFCwE=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "c621e8422220273271f52058f618c94e405bb0f5",
+        "rev": "506278e768c2a08bec68eb62932193e341f55c90",
         "type": "github"
       },
       "original": {
@@ -57,14 +42,15 @@
         "gitignore": "gitignore",
         "nixpkgs": [
           "nixpkgs"
-        ]
+        ],
+        "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1747372754,
+        "lastModified": 1733318908,
-        "narHash": "sha256-2Y53NGIX2vxfie1rOW0Qb86vjRZ7ngizoo+bnXU9D9k=",
+        "narHash": "sha256-SVQVsbafSM1dJ4fpgyBqLZ+Lft+jcQuMtEL3lQWx2Sk=",
         "owner": "cachix",
         "repo": "git-hooks.nix",
-        "rev": "80479b6ec16fefd9c1db3ea13aeb038c60530f46",
+        "rev": "6f4e2a2112050951a314d2733a994fbab94864c6",
         "type": "github"
       },
       "original": {
@@ -96,23 +82,38 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1748162331,
+        "lastModified": 1731755305,
-        "narHash": "sha256-rqc2RKYTxP3tbjA+PB3VMRQNnjesrT0pEofXQTrMsS8=",
+        "narHash": "sha256-v5P3dk5JdiT+4x69ZaB18B8+Rcu3TIOrcdG4uEX7WZ8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7c43f080a7f28b2774f3b3f43234ca11661bf334",
+        "rev": "057f63b6dc1a2c67301286152eb5af20747a9cb4",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-25.05",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1730741070,
+        "narHash": "sha256-edm8WG19kWozJ/GqyYx2VjW99EdhjKwbY3ZwdlPAAlo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d063c1dd113c91ab27959ba540c0d9753409edf3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "root": {
       "inputs": {
-        "crane": "crane",
         "flake-parts": "flake-parts",
         "git-hooks-nix": "git-hooks-nix",
         "nixpkgs": "nixpkgs",
@@ -126,11 +127,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1748243702,
+        "lastModified": 1733440889,
-        "narHash": "sha256-9YzfeN8CB6SzNPyPm2XjRRqSixDopTapaRsnTpXUEY8=",
+        "narHash": "sha256-qKL3vjO+IXFQ0nTinFDqNq/sbbnnS5bMI1y0xX215fU=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "1f3f7b784643d488ba4bf315638b2b0a4c5fb007",
+        "rev": "50862ba6a8a0255b87377b9d2d4565e96f29b410",
         "type": "github"
       },
       "original": {

flake.nix

@@ -2,12 +2,11 @@
   description = "An opinionated Nixos Mailsystem";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
     flake-parts.url = "github:hercules-ci/flake-parts";
     flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
     treefmt-nix.url = "github:numtide/treefmt-nix";
     treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
-    crane.url = "github:ipetkov/crane";
     git-hooks-nix.url = "github:cachix/git-hooks.nix";
     git-hooks-nix.inputs.nixpkgs.follows = "nixpkgs";
   };
@@ -24,7 +23,6 @@
         "aarch64-linux"
       ];
       imports = [
-        flake-parts.flakeModules.easyOverlay
         inputs.treefmt-nix.flakeModule
         inputs.git-hooks-nix.flakeModule
       ];
@@ -36,12 +34,9 @@
         pkgs,
         system,
         ...
-      }: let
+      }: {
-        craneLib = inputs.crane.mkLib pkgs;
-        pkgs = nixpkgs.legacyPackages.${system}.extend self.overlays.default;
-      in {
         checks = let
-          tests = ["internal" "basic" "aliases" "rspamd"];
+          tests = ["internal" "basic" "aliases"];
           genTest = testName: {
             "name" = testName;
             "value" = import (./tests + "/${testName}.nix") {inherit pkgs;};
@@ -49,20 +44,9 @@
         in
           pkgs.lib.listToAttrs (map genTest tests);
 
-        packages = rec {
+        devShells.default = pkgs.mkShell {
-          default = mailnix;
-          mailnix = craneLib.buildPackage {
-            src = craneLib.cleanCargoSource ./pkgs/mailnix;
-          };
-        };
-        overlayAttrs = {
-          mailnix = config.packages.mailnix;
-        };
-
-        devShells.default = craneLib.devShell {
           packages = with pkgs; [
             self'.formatter.outPath # Add all formatters to environment
-            mailnix
           ];
           shellHook = ''
             ${config.pre-commit.installationScript}
@@ -75,9 +59,7 @@
 
         treefmt = {
           programs = {
-            actionlint.enable = true;
             alejandra.enable = true;
-            rustfmt.enable = true;
           };
           settings.global.excludes = [
             ".envrc"
@@ -86,7 +68,7 @@
         };
       };
 
-      flake.nixosModules = rec {
+      flake.flakeModules = rec {
         default = mailsystem;
         mailsystem = import ./mailsystem;
       };

mailsystem/common.nix

@@ -1,8 +1,4 @@
-{
+{config, ...}: let
-  config,
-  pkgs,
-  ...
-}: let
   cfg = config.mailsystem;
 in rec {
   certificateDirectory = "/var/certs";
@@ -21,17 +17,6 @@ in rec {
     then ["acme-finished-${cfg.fqdn}.target"]
     else ["mailsystem-selfsigned-certificate.service"];
 
-  mailnixCmd = let
-    mailnixCfgFile = pkgs.writeText "mailnix-public.json" (builtins.toJSON {
-      inherit (cfg) accounts domains;
-      aliases = cfg.virtualAliases;
-    });
-    extraCfgFile =
-      if (cfg.extraSettingsFile != null)
-      then cfg.extraSettingsFile
-      else "";
-  in "${pkgs.mailnix}/bin/mailnix ${extraCfgFile} ${mailnixCfgFile}";
-
   dovecotDynamicStateDir = "/var/lib/dovecot";
   dovecotDynamicPasswdFile = "${dovecotDynamicStateDir}/passwd";
 

mailsystem/default.nix

@@ -92,6 +92,27 @@ in {
             '';
           };
 
+          aliases = lib.mkOption {
+            type = with lib.types; listOf types.str;
+            example = ["abuse@example.com" "postmaster@example.com"];
+            default = [];
+            description = ''
+              A list of aliases of this login account.
+              Note: Use list entries like "@example.com" to create a catchAll
+              that allows sending from all email addresses in these domain.
+            '';
+          };
+
+          quota = lib.mkOption {
+            type = with lib.types; nullOr types.str;
+            default = null;
+            example = "2G";
+            description = ''
+              Sets quota for the this login account. The size has to be suffixed with `k/M/G/T`.
+              Not setting a quota results in a standard quota of `100G`.
+            '';
+          };
+
           isSystemUser = lib.mkOption {
             type = lib.types.bool;
             default = false;
@@ -101,17 +122,7 @@ in {
               account will be rejected.
             '';
           };
-
-          rejectMessage = lib.mkOption {
-            type = lib.types.str;
-            default = "This account cannot receive emails.";
-            description = ''
-              The message that will be returned to the sender when an email is
-              sent to a system account.
-            '';
         };
-        };
-
         config.name = lib.mkDefault name;
       }));
       example = {
@@ -122,102 +133,54 @@ in {
           hashedPassword = "$6$oE0ZNv2n7Vk9gOf$9xcZWCCLGdMflIfuA0vR1Q1Xblw6RZqPrP94mEit2/81/7AKj2bqUai5yPyWE.QYPyv6wLMHZvjw3Rlg7yTCD/";
         };
       };
-      description = "All available accounts for the mailsystem.";
+      description = "All available login account for the mailsystem.";
       default = {};
     };
 
-    virtualAliases = lib.mkOption {
+    virtualDomainAliases = lib.mkOption {
-      type = let
+      type = with lib.types; attrsOf str;
-        isAccount = value: builtins.elem value (builtins.attrNames cfg.accounts);
+      example = {
-        isDomain = value: !(lib.hasInfix "@" value) && (builtins.elem value cfg.domains);
+        "@aliasdomain.com" = "@domain.com";
-        account = lib.mkOptionType {
-          name = "Mail Account";
-          check = isAccount;
       };
-        accountOrDomain = lib.mkOptionType {
+      description = ''
-          name = "Mail Account or Domain";
+        Virtual aliasing of domains. A virtual alias `"@aliasdomain.com" = "@domain.com"`
-          check = value: (isAccount value) || (isDomain value);
+        means that all mail directed at `aliasdomain.com` are forwarded to `domain.com`.
+        This also entails, that any account or alias of `domain.com` is partially valid
+        for `aliasdomain.com`. For example, `user@domain.com` can receive mails at
+        `user@aliasdomain.com`. However, if `user@domain.com` shall be able to dispatch
+        mails using `user@aliasdomain.com`, an explicit alias needs to be configured.
+      '';
+      default = {};
+    };
+
+    extraVirtualAliases = lib.mkOption {
+      type = let
+        account = lib.mkOptionType {
+          name = "Login Account";
+          check = account: builtins.elem account (builtins.attrNames cfg.accounts);
         };
       in
-        with lib.types; attrsOf (either (nonEmptyListOf account) accountOrDomain);
+        with lib.types; attrsOf (either account (nonEmptyListOf account));
       example = {
         "info@example.com" = "user1@example.com";
         "postmaster@example.com" = "user1@example.com";
         "abuse@example.com" = "user1@example.com";
         "multi@example.com" = ["user1@example.com" "user2@example.com"];
-        "aliasdomain.com" = "domain.com";
       };
       description = ''
-              Virtual account and domain aliases. A virtual alias means, that all mail directed
+        Virtual Aliases. A virtual alias `"info@example.com" = "user1@example.com"` means that
-        at a given target are forwarded to the specified other destinations, too.
+        all mail to `info@example.com` is forwarded to `user1@example.com`. Note
-
+        that it is expected that `postmaster@example.com` and `abuse@example.com` is
-        For account aliases, this means that, e.g., `"user1@example.com"` receives all mail
+        forwarded to some valid email address. (Alternatively you can create login
-        sent to `"info@example.com"`. In addition, `"user1@example.com"` is also able to
+        accounts for `postmaster` and (or) `abuse`). Furthermore, it also allows
-        impersonate `"info@example.com"` when sending mails. It is also possible to create
+        the user `user1@example.com` to send emails as `info@example.com`.
-        an alias for multiple accounts. In this example, all mails for `"multi@example.com"`
+        It's also possible to create an alias for multiple accounts. In this
-        will be forwarded to both
+        example all mails for `multi@example.com` will be forwarded to both
-              `"user1@example.com"` and `"user2@example.com"`.
+        `user1@example.com` and `user2@example.com`.
-
-        For domain aliases, this means that all mails directed at an aliased domain, e.g.,
-        `"aliasdomain.com"` are forwarded to `"domain.com"` This also entails, that any
-        account or alias of `"domain.com"` receives mails directed at `"aliasdomain.com"`.
-        However, if `"user@domain.com"` shall be able to send mails using
-        `"user@aliasdomain.com"`, an explicit alias needs to be configured.
       '';
       default = {};
     };
 
-    dkimSettings = lib.mkOption {
-      type = with lib.types;
-        attrsOf (listOf (submodule {
-          options = {
-            selector = lib.mkOption {
-              type = lib.types.str;
-              example = "mail";
-              description = "DKIM Selector";
-            };
-            keyFile = lib.mkOption {
-              type = lib.types.path;
-              example = "/run/secrets/dkim/example.com.mail.key";
-              description = ''
-                Path to DKIM private-key-file. A public-private-pair can be generated as follows:
-
-                ```
-                nix-shell -p rspamd --run 'rspamadm dkim_keygen -s "selector" -t ed25519 -d example.com
-                nix-shell -p rspamd --run 'rspamadm dkim_keygen -s "selector" -b 2048 -d example.com
-                ```
-              '';
-            };
-          };
-        }));
-      example = {
-        "example.com" = [
-          {
-            selector = "mail";
-            keyFile = "/run/secrets/dkim/example.com.mail.key";
-          }
-        ];
-      };
-      description = ''
-        Per-domain DKIM configuration.
-        This option allows to optionally set one or more DKIM private keys
-        and their respective selectors for each domain individually.
-      '';
-      default = {};
-    };
-
-    extraSettingsFile = lib.mkOption {
-      type = lib.types.nullOr lib.types.path;
-      description = ''
-        YAML file to merge into the mailsystem configuration at runtime.
-        This can be used to store secrets, and, more importantly, keep your email
-        addresses out of the hands of spammers. This `extraSettingsFile` currently
-        supports `domains`, `accounts` and `virtualAliases` which can be defined in
-        the same manner as they can be via nix.
-      '';
-      default = null;
-    };
-
     certificateScheme = lib.mkOption {
       type = lib.types.enum ["acme" "selfsigned"];
       default = "acme";

mailsystem/dovecot.nix

@@ -4,7 +4,7 @@
   pkgs,
   ...
 }:
-with (import ./common.nix {inherit config pkgs;}); let
+with (import ./common.nix {inherit config;}); let
   cfg = config.mailsystem;
   postfixCfg = config.services.postfix;
   dovecot2Cfg = config.services.dovecot2;
@@ -19,7 +19,13 @@ with (import ./common.nix {inherit config pkgs;}); let
   systemUsers = lib.filterAttrs (user: value: value.isSystemUser) cfg.accounts;
   normalUsers = lib.filterAttrs (user: value: !value.isSystemUser) cfg.accounts;
 
-  genUserdbEntry = user: value: "${user}:::::::";
+  genUserdbEntry = user: value:
+    "${user}:::::::"
+    + (
+      if lib.isString value.quota
+      then "userdb_quota_rule=*:storage=${value.quota}"
+      else ""
+    );
   genPasswdEntry = user: value: "${user}:${"$(head -n 1 ${value.hashedPasswordFile})"}::::::";
 
   genAuthDbsScript = pkgs.writeScript "generate-dovecot-auth-dbs" ''
@@ -39,22 +45,51 @@ with (import ./common.nix {inherit config pkgs;}); let
     # Ensure passwd files are not world-readable at any time
     umask 077
 
+    # Ensure we have a file for every user's (initial) password hash.
+    for f in ${builtins.toString (lib.mapAttrsToList (user: value: value.hashedPasswordFile) cfg.accounts)}; do
+      if [ ! -f "$f" ]; then
+        echo "Expected password hash file $f does not exist!"
+        exit 1
+      fi
+    done
+
     # Prepare static passwd-file for system users
-    ${mailnixCmd} generate-static-passdb > "${staticPasswdFile}"
+    cat <<EOF > "${staticPasswdFile}"
+    ${lib.concatStringsSep "\n" (lib.mapAttrsToList genPasswdEntry systemUsers)}
+    EOF
 
-    # Prepare/Update passwd-file for dynamic users
+    # Prepare initial passwd-file for dynamic users
-    ${mailnixCmd} update-dynamic-passdb ${dovecotDynamicPasswdFile} > "${dovecotDynamicPasswdFile}"
+    # (used for lookup during actual passwd-file generation)
+    cat <<EOF > "${initialPasswdFile}"
+    ${lib.concatStringsSep "\n" (lib.mapAttrsToList genPasswdEntry normalUsers)}
+    EOF
 
-    ${lib.optionalString cfg.roundcube.enable ''
+    # Check for existence of dynamic passwd-file
-      # Ensure roundcube has access to dynamic passwd file
+    touch "${dovecotDynamicPasswdFile}"
-      ${pkgs.acl.bin}/bin/setfacl -m "u:${config.services.phpfpm.pools.roundcube.user}:rw" "${dovecotDynamicPasswdFile}"
+    if (! test -f "${dovecotDynamicPasswdFile}"); then
-    ''}
+      echo "${dovecotDynamicPasswdFile} exists and is no regular file"
+      exit 1
+    fi
+    # Ensure that only configured users are actually present and remove any others
+    truncate -s 0 "${dovecotDynamicPasswdFile}-filtered"
+    for u in ${builtins.toString (lib.mapAttrsToList (user: value: value.name) normalUsers)}; do
+      if grep -q "^$u:" "${dovecotDynamicPasswdFile}"; then
+        # User already has some password set -> Keep currently set password
+        grep "^$u:" "${dovecotDynamicPasswdFile}" >> "${dovecotDynamicPasswdFile}-filtered"
+      else
+        # User has no password set, yet -> Take password from initialPasswdFile
+        grep "^$u:" "${initialPasswdFile}" >> "${dovecotDynamicPasswdFile}-filtered"
+      fi
+    done
+    mv "${dovecotDynamicPasswdFile}-filtered" "${dovecotDynamicPasswdFile}"
 
     # Prepare userdb-file
-    ${mailnixCmd} generate-userdb > "${userdbFile}"
+    cat <<EOF > "${userdbFile}"
+    ${lib.concatStringsSep "\n" (lib.mapAttrsToList genUserdbEntry cfg.accounts)}
+    EOF
   '';
 
-  genMaildirScript = pkgs.writeScript "generate-maildir" ''
+  genMaildir = pkgs.writeScript "generate-maildir" ''
     #!${pkgs.stdenv.shell}
 
     # Create mail directory and set permissions accordingly.
@@ -94,14 +129,6 @@ in {
       )
       cfg.accounts;
 
-    environment.systemPackages = [
-      # sieves + managesieve
-      pkgs.dovecot_pigeonhole
-    ];
-
-    # For compatibility with python imaplib
-    environment.etc."dovecot/modules".source = "/run/current-system/sw/lib/dovecot/modules";
-
     services.dovecot2 = {
       enable = true;
       enableImap = true;
@@ -117,6 +144,11 @@ in {
 
       enableLmtp = true;
 
+      modules = [
+        # sieves + managesieve
+        pkgs.dovecot_pigeonhole
+      ];
+
       # enable managesieve
       protocols = ["sieve"];
 
@@ -236,7 +268,7 @@ in {
         userdb {
           driver = passwd-file
           args = ${userdbFile}
-          default_fields = uid=${builtins.toString cfg.vmailUID} gid=${builtins.toString cfg.vmailUID} home=${cfg.mailDirectory}/%{domain}/%{username}
+          default_fields = uid=${builtins.toString cfg.vmailUID} gid=${builtins.toString cfg.vmailUID} home=${cfg.mailDirectory}/%d/%n
         }
 
         service auth {
@@ -264,7 +296,7 @@ in {
     systemd.services.dovecot2 = {
       preStart = ''
         ${genAuthDbsScript}
-        ${genMaildirScript}
+        ${genMaildir}
       '';
       wants = sslCertService;
       after = sslCertService;

mailsystem/nginx.nix

@@ -4,21 +4,18 @@
   lib,
   ...
 }:
-with (import ./common.nix {inherit config pkgs;}); let
+with (import ./common.nix {inherit config;}); let
   cfg = config.mailsystem;
 in {
   config =
     lib.mkIf cfg.enable {
       services.nginx = {
         enable = true;
-        virtualHosts."${cfg.fqdn}" =
+        virtualHosts."${cfg.fqdn}" = {
-          {
           forceSSL = true;
           enableACME = cfg.certificateScheme == "acme";
-          }
+          sslCertificate = lib.mkIf (cfg.certificateScheme == "selfsigned") sslCertPath;
-          // lib.optionalAttrs (cfg.certificateScheme == "selfsigned") {
+          sslCertificateKey = lib.mkIf (cfg.certificateScheme == "selfsigned") sslKeyPath;
-            sslCertificate = sslCertPath;
-            sslCertificateKey = sslKeyPath;
         };
       };
 

mailsystem/postfix.nix

@@ -4,29 +4,55 @@
   pkgs,
   ...
 }:
-with (import ./common.nix {inherit config pkgs;}); let
+with (import ./common.nix {inherit config;}); let
   cfg = config.mailsystem;
 
   mappedFile = name: "hash:/var/lib/postfix/conf/${name}";
 
-  runtimeDir = "/run/postfix";
+  attrsToLookupTable = aliases: let
-  aliases_file = "${runtimeDir}/virtual_aliases";
+    lookupTables = lib.mapAttrsToList (from: to: {"${from}" = to;}) aliases;
-  virtual_domains_file = "${runtimeDir}/virtual_domains";
+  in
-  denied_recipients_file = "${runtimeDir}/denied_recipients";
+    mergeLookupTables lookupTables;
 
-  genPostmapsScript = pkgs.writeScript "generate-postfix-postmaps" ''
+  lookupTableToString = attrs: let
-    #!${pkgs.stdenv.shell}
+    valueToString = value: lib.concatStringsSep ", " value;
-    set -euo pipefail
+  in
+    lib.concatStringsSep "\n" (lib.mapAttrsToList (name: value: "${name} ${valueToString value}") attrs);
 
-    if (! test -d "${runtimeDir}"); then
+  mergeLookupTables = tables: lib.zipAttrsWith (n: v: lib.flatten v) tables;
-      mkdir "${runtimeDir}"
-      chmod 755 "${runtimeDir}"
-    fi
 
-    ${mailnixCmd} "generate-aliases" > "${aliases_file}"
+  account_virtual_aliases = mergeLookupTables (lib.flatten (lib.mapAttrsToList
-    ${mailnixCmd} "generate-domains" > "${virtual_domains_file}"
+    (name: value: let
-    ${mailnixCmd} "generate-denied-recipients" > "${denied_recipients_file}"
+      to = name;
-  '';
+    in
+      map (from: {"${from}" = to;}) (value.aliases ++ lib.singleton name))
+    cfg.accounts));
+
+  virtual_domain_aliases = let
+    alias_domains =
+      lib.concatMapAttrs (src: dst: {
+        "@${src}" = "@${dst}";
+      })
+      cfg.virtualDomainAliases;
+  in
+    attrsToLookupTable alias_domains;
+
+  extra_virtual_aliases = attrsToLookupTable cfg.extraVirtualAliases;
+
+  all_virtual_aliases = mergeLookupTables [account_virtual_aliases virtual_domain_aliases extra_virtual_aliases];
+
+  aliases_file = let
+    content = lookupTableToString all_virtual_aliases;
+  in
+    builtins.toFile "virtual_aliases" content;
+
+  # File containing all mappings of authenticated accounts and their sender mail addresses.
+  virtual_accounts_file = let
+    content = lookupTableToString all_virtual_aliases;
+  in
+    builtins.toFile "virtual_accounts" content;
+
+  virtual_domains_file = builtins.toFile "virtual_domains" (lib.concatStringsSep "\n" cfg.domains);
 
   submission_header_cleanup_rules = pkgs.writeText "submission_header_cleanup_rules" ''
     # Removes sensitive headers from mails handed in via the submission port.
@@ -48,15 +74,14 @@ with (import ./common.nix {inherit config pkgs;}); let
   tls_exclude_ciphers = "MD5, DES, ADH, RC4, PSD, SRP, 3DES, eNULL, aNULL";
 in {
   config = lib.mkIf cfg.enable {
-    assertions = let
+    assertions =
-      isDomain = value: !lib.hasInfix "@" value;
+      lib.mapAttrsToList (
-      aliasedDomains = builtins.filter isDomain (builtins.attrNames cfg.virtualAliases);
+        src: dst: {
-    in
+          assertion = (builtins.elem src cfg.domains) && (builtins.elem dst cfg.domains);
-      map (domain: {
+          message = "Both aliased domain (${src}) and actual domain (${dst}) need to be managed by the mailserver.";
-        assertion = builtins.elem domain cfg.domains;
+        }
-        message = "The domain to be aliased (${domain}) must be managed by the mailserver.";
+      )
-      })
+      cfg.virtualDomainAliases;
-      aliasedDomains;
 
     services.postfix = {
       enable = true;
@@ -68,8 +93,10 @@ in {
 
       enableSubmissions = true;
 
+      # TODO: create function to simplify this?
       mapFiles."virtual_aliases" = aliases_file;
-      mapFiles."denied_recipients" = denied_recipients_file;
+      mapFiles."virtual_accounts" = virtual_accounts_file;
+      virtual = lookupTableToString all_virtual_aliases;
 
       submissionsOptions = {
         smtpd_tls_security_level = "encrypt";
@@ -79,7 +106,8 @@ in {
         smtpd_sasl_security_options = "noanonymous";
         smtpd_sasl_local_domain = "$myhostname";
         smtpd_client_restrictions = "permit_sasl_authenticated,reject";
-        smtpd_sender_login_maps = mappedFile "virtual_aliases";
+        # use mappedFile -> different path?
+        smtpd_sender_login_maps = "hash:/etc/postfix/virtual_accounts";
         smtpd_sender_restrictions = "reject_sender_login_mismatch";
         smtpd_recipient_restrictions = "reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_sasl_authenticated,reject";
         cleanup_service_name = "submission-header-cleanup";
@@ -96,9 +124,6 @@ in {
         virtual_gid_maps = "static:${toString cfg.vmailUID}";
         virtual_mailbox_base = cfg.mailDirectory;
         virtual_mailbox_domains = virtual_domains_file;
-        virtual_alias_maps = [
-          (mappedFile "virtual_aliases")
-        ];
         virtual_mailbox_maps = [
           (mappedFile "virtual_aliases")
         ];
@@ -115,9 +140,11 @@ in {
           "permit_sasl_authenticated"
           "reject_unauth_destination"
         ];
-        smtpd_recipient_restrictions = [
+
-          "check_recipient_access ${mappedFile "denied_recipients"}"
+        # quota checking # TODO: wo ist hier quota??
-        ];
+        # smtpd_recipient_restrictions = [
+        #   "check_policy_service inet:localhost:12340" # XXX
+        # ];
 
         # TLS settings, inspired by https://github.com/jeaye/nix-files
         # Submission by mail clients is handled in submissionOptions
@@ -182,11 +209,6 @@ in {
       };
     };
 
-    systemd.services.postfix-setup = {
-      preStart = ''
-        ${genPostmapsScript}
-      '';
-    };
     systemd.services.postfix = {
       wants = sslCertService;
       after =

mailsystem/roundcube.nix

@@ -4,14 +4,14 @@
   pkgs,
   ...
 }:
-with (import ./common.nix {inherit config pkgs;}); let
+with (import ./common.nix {inherit config;}); let
   cfg = config.mailsystem;
   roundcubeCfg = config.mailsystem.roundcube;
 in {
   options.mailsystem.roundcube = {
     enable = lib.mkOption {
       type = lib.types.bool;
-      default = false;
+      default = true;
       description = "Whether to enable roundcube in order to provide a webmail interface";
     };
     hostName = lib.mkOption {
@@ -32,9 +32,8 @@ in {
       hostName = roundcubeCfg.hostName;
       plugins = ["managesieve" "password"];
       extraConfig = ''
-        // Use implicitly encrypted communications for imap and imap (implicit tls)
+        // Use starttls for authentication
-        $config['imap_host'] = "ssl://${cfg.fqdn}";
+        $config['smtp_host'] = "tls://${cfg.fqdn}";
-        $config['smtp_host'] = "ssl://${cfg.fqdn}";
         $config['smtp_user'] = "%u";
         $config['smtp_pass'] = "%p";
 
@@ -47,8 +46,8 @@ in {
         // Enables saving the new password even if it machtes the old password. Useful
         // for upgrading the stored passwords after the encryption scheme has changed.
         $config['password_force_save'] = true;
-        $config['password_dovecot_passwdfile_path'] = "${dovecotDynamicPasswdFile}";
+        $config['password_dovecot_passwdfile_path'] = "${pkgs.dovecot}/bin/doveadm pw";
-        $config['password_dovecotpw'] = "${pkgs.dovecot}/bin/doveadm pw";
+        $config['password_dovecotpw'] = "${dovecotDynamicPasswdFile}";
         $config['password_dovecotpw_method'] = "${roundcubeCfg.passwordHashingAlgorithm}";
         $config['password_dovecotpw_with_method'] = true;
       '';

mailsystem/rspamd.nix

@@ -4,15 +4,14 @@
   pkgs,
   ...
 }:
-with (import ./common.nix {inherit config pkgs;}); let
+with (import ./common.nix {inherit config;}); let
   cfg = config.mailsystem;
-  dovecot2Cfg = config.services.dovecot2;
+  nginxcfg = config.services.nginx;
-  nginxCfg = config.services.nginx;
   postfixCfg = config.services.postfix;
   redisCfg = config.services.redis.servers.rspamd;
   rspamdCfg = config.services.rspamd;
 
-  genSystemdSocketCfg = name: socketPath: additionalUsers: {
+  genSystemdSocketCfg = name: socketPath: additionalUser: {
     description = "rspamd ${name} worker socket";
     listenStreams = [socketPath];
     requiredBy = ["rspamd.service"];
@@ -21,48 +20,31 @@ with (import ./common.nix {inherit config pkgs;}); let
       SocketUser = rspamdCfg.user;
       SocketMode = 0600;
       ExecStartPost =
-        lib.mkIf (additionalUsers != [])
+        lib.mkIf (additionalUser != "")
-        (pkgs.writeShellScript "set-systemd-socket-permissions"
+        ''${pkgs.acl.bin}/bin/setfacl -m "u:${additionalUser}:rw" "${socketPath}"'';
-          (lib.concatMapStringsSep "\n" (user: ''${pkgs.acl.bin}/bin/setfacl -m "u:${user}:rw" "${socketPath}"'')
-            additionalUsers));
     };
   };
 in {
   options.mailsystem.rspamd.webUi = {
     enable = lib.mkOption {
       type = lib.types.bool;
-      default = false;
+      default = true;
       description = "Whether to enable the rspamd webui on `https://${config.mailsystem.fqdn}/rspamd`";
     };
 
     basicAuthFile = lib.mkOption {
       type = lib.types.str;
-      description = "Path to basic auth file (entries can be generated using htpasswd)";
+      description = "Path to basic auth file";
     };
   };
 
   config = lib.mkIf cfg.enable {
-    assertions =
+    assertions = [
-      [
       {
         assertion = !cfg.rspamd.webUi.enable || cfg.rspamd.webUi.basicAuthFile != null;
         message = "Setting basicAuthFile is required if rspamd's web interface is enabled";
       }
-      ]
+    ];
-      ++ lib.mapAttrsToList (
-        domain: dkimList: {
-          assertion = builtins.elem domain cfg.domains;
-          message = "Domain ${domain} as per `config.mailsystem.dkimSettings` needs to be managed by the mailserver.";
-        }
-      )
-      cfg.dkimSettings
-      ++ lib.mapAttrsToList (
-        domain: dkimList: {
-          assertion = dkimList != [];
-          message = "Entry ${domain} as per `config.mailsystem.dkimSettings` must not be an empty list.";
-        }
-      )
-      cfg.dkimSettings;
 
     services.rspamd = {
       enable = true;
@@ -75,38 +57,6 @@ in {
             }
           '';
         };
-        "dkim_signing.conf" = let
-          genDkimSelectorList = entry: ''
-            {
-              path: "${entry.keyFile}";
-              selector: "${entry.selector}";
-            }
-          '';
-          genDkimDomainCfg = domain: domainSettings: ''
-            ${domain} {
-              selectors [
-                ${lib.concatStringsSep "\n" (map genDkimSelectorList domainSettings)}
-              ]
-            }
-          '';
-        in {
-          text =
-            ''
-              sign_authenticated = true;
-              use_esld = true;
-              use_domain = "header";
-              check_pubkey = true;
-              allow_username_mismatch = true;
-              allow_hdrfrom_mismatch = true;
-              allow_hdrfrom_mismatch_sign_networks = true;
-
-            ''
-            + lib.optionalString (cfg.dkimSettings != {}) ''
-              domain {
-                ${lib.concatStringsSep "\n" (lib.mapAttrsToList genDkimDomainCfg cfg.dkimSettings)}
-              }
-            '';
-        };
         "milter_headers.conf" = {
           text = ''
             # Add headers related to spam-detection
@@ -152,8 +102,10 @@ in {
     };
 
     systemd.sockets = {
-      rspamd-proxy = genSystemdSocketCfg "proxy" rspamdProxySocket [postfixCfg.user];
+      rspamd-proxy = genSystemdSocketCfg "proxy" rspamdProxySocket postfixCfg.user;
-      rspamd-controller = genSystemdSocketCfg "controller" rspamdControllerSocket ([dovecot2Cfg.mailUser] ++ lib.optional cfg.rspamd.webUi.enable nginxCfg.user);
+      rspamd-controller = genSystemdSocketCfg "controller" rspamdControllerSocket (
+        lib.optionalString cfg.rspamd.webUi.enable nginxCfg.user
+      );
     };
 
     systemd.services.rspamd = {
@@ -168,10 +120,6 @@ in {
         locations."/rspamd" = {
           proxyPass = "http://unix:${rspamdControllerSocket}:/";
           basicAuthFile = cfg.rspamd.webUi.basicAuthFile;
-          extraConfig = ''
-            proxy_set_header Host $host;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-          '';
         };
         sslCertificate = lib.mkIf (cfg.certificateScheme == "selfsigned") sslCertPath;
         sslCertificateKey = lib.mkIf (cfg.certificateScheme == "selfsigned") sslKeyPath;

mailsystem/selfsigned.nix

@@ -4,7 +4,7 @@
   lib,
   ...
 }:
-with (import ./common.nix {inherit config pkgs;}); let
+with (import ./common.nix {inherit config;}); let
   cfg = config.mailsystem;
 in {
   config = lib.mkIf (cfg.enable && cfg.certificateScheme == "selfsigned") {

pkgs/mailnix/Cargo.lock

@@ -1,806 +0,0 @@
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-
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-
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-name = "android_system_properties"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
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-
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pkgs/mailnix/Cargo.toml

@@ -1,11 +0,0 @@
-[package]
-name = "mailnix"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-clap = { version = "4.5.28", features = ["derive"] }
-regex = "1.11.1"
-serde = { version = "1.0.217", features = ["derive", "rc"] }
-serde_with = "3.12.0"
-serde_yml = "0.0.12"

pkgs/mailnix/src/cli.rs

@@ -1,22 +0,0 @@
-use clap::{Parser, Subcommand};
-
-#[derive(Subcommand, Debug)]
-pub enum Commands {
-    Check,
-    GenerateUserdb,
-    GenerateStaticPassdb,
-    UpdateDynamicPassdb { path: String },
-    GenerateAliases,
-    GenerateDeniedRecipients,
-    GenerateDomains,
-}
-
-#[derive(Parser, Debug)]
-#[command(author, version, about)]
-pub struct Cli {
-    pub config_path: String,
-    pub additional_config_path: Option<String>,
-
-    #[command(subcommand)]
-    pub command: Commands,
-}

pkgs/mailnix/src/config.rs

@@ -1,226 +0,0 @@
-use serde::Deserialize;
-use serde_with::formats::PreferMany;
-use serde_with::{MapPreventDuplicates, OneOrMany, serde_as};
-
-use regex::Regex;
-use std::collections::{HashMap, HashSet};
-use std::error::Error;
-use std::fs::{self, File};
-use std::io::BufReader;
-use std::path::Path;
-
-#[serde_as]
-#[derive(Debug, Deserialize)]
-#[serde(deny_unknown_fields)]
-pub struct Config {
-    #[serde(default)]
-    pub domains: Vec<String>,
-
-    #[serde(default)]
-    #[serde_as(deserialize_as = "MapPreventDuplicates<_, _>")]
-    pub accounts: HashMap<String, AccountConfig>,
-
-    #[serde(default)]
-    #[serde_as(deserialize_as = "MapPreventDuplicates<_, OneOrMany<_, PreferMany>>")]
-    pub aliases: HashMap<String, Vec<String>>,
-}
-
-fn default_reject_message() -> String {
-    "This account cannot receive emails.".to_string()
-}
-
-#[derive(Clone, Debug, Deserialize)]
-pub struct AccountConfig {
-    #[serde(rename(deserialize = "hashedPassword"))]
-    #[serde(skip)]
-    pub hashed_password: String,
-
-    #[serde(rename(deserialize = "hashedPassword"))]
-    hashed_password_: Option<String>,
-
-    #[serde(rename(deserialize = "hashedPasswordFile"))]
-    hashed_password_file_: Option<String>,
-
-    #[serde(default, rename(deserialize = "isSystemUser"))]
-    pub is_system_user: bool,
-
-    #[serde(
-        default = "default_reject_message",
-        rename(deserialize = "rejectMessage")
-    )]
-    pub reject_message: String,
-}
-
-fn sanitize_vec(vec: &mut [String]) -> Result<(), Box<dyn Error>> {
-    let mut seen = HashSet::new();
-    for item in vec.iter_mut() {
-        *item = item.to_lowercase();
-        if !seen.insert(item.clone()) {
-            return Err(format!("Duplicate entry ({item}) detected, aborting...").into());
-        }
-    }
-    Ok(())
-}
-
-fn sanitize_map_keys<T: Clone>(map: &mut HashMap<String, T>) -> Result<(), Box<dyn Error>> {
-    let mut new_map = HashMap::<String, T>::new();
-    let mut seen = HashSet::new();
-    for (k, v) in map.iter() {
-        let new_k = k.to_lowercase();
-        new_map.insert(new_k.clone(), v.clone());
-        if !seen.insert(new_k.clone()) {
-            return Err(format!("Duplicate entry ({new_k}) detected, aborting...").into());
-        }
-    }
-    *map = new_map;
-    Ok(())
-}
-
-fn is_domain(address: &str) -> bool {
-    !address.contains("@")
-}
-
-fn parse_address(address: &str) -> Result<(String, String), Box<dyn Error>> {
-    let address_pattern = Regex::new(r"^(?P<local_part>.*)@(?P<domain>.*)$").unwrap();
-    let caps = address_pattern
-        .captures(address)
-        .ok_or("Mail address regex does not match for \"{address}\"")
-        .unwrap();
-    Ok((caps["local_part"].to_string(), caps["domain"].to_string()))
-}
-
-impl Config {
-    pub fn load<P: AsRef<Path>>(path: P) -> Result<Config, Box<dyn Error>> {
-        let file = File::open(path)?;
-        let reader = BufReader::new(file);
-
-        let mut cfg: Config = serde_yml::from_reader(reader)?;
-        cfg.sanitize()?;
-        for (name, acc) in cfg.accounts.iter_mut() {
-            match (
-                acc.hashed_password_.clone(),
-                acc.hashed_password_file_.clone(),
-            ) {
-                (Some(_hash), Some(_file)) => {
-                    return Err("Account {name} has both HashedPassword and HashedPasswordFile set, aborting...".into());
-                }
-                (Some(hash), None) => {
-                    acc.hashed_password = hash;
-                }
-                (None, Some(file)) => {
-                    let hash = fs::read_to_string(file.clone()).unwrap_or_else(|err| {
-                        panic!("Account ({name}): Reading {file} failed: {err:?}")
-                    });
-                    acc.hashed_password = hash.trim().to_string();
-                }
-                (None, None) => {
-                    return Err("Account {name} is missing HashedPassword or HashedPasswordFile, aborting...".into());
-                }
-            }
-        }
-        Ok(cfg)
-    }
-
-    fn sanitize(&mut self) -> Result<(), Box<dyn Error>> {
-        // standardize capitalization, ...
-        sanitize_vec(&mut self.domains).unwrap_or_else(|err| panic!("domain: {err:?}"));
-        sanitize_map_keys(&mut self.accounts).unwrap_or_else(|err| panic!("accounts: {err:?}"));
-        sanitize_map_keys(&mut self.aliases).unwrap_or_else(|err| panic!("aliases: {err:?}"));
-        for (from, dests) in self.aliases.iter_mut() {
-            sanitize_vec(&mut *dests).unwrap_or_else(|err| panic!("aliases ({from}): {err:?}"));
-        }
-        Ok(())
-    }
-
-    fn is_valid_destination(&self, address: &String) -> bool {
-        if self.accounts.contains_key(address) {
-            return true;
-        }
-
-        // There is no explicit account matching 'address'. However, 'address' may still be
-        // implicitly valid due to the existence of a catchall-alias or the domain being aliased.
-        let (local_part, domain) = parse_address(address).unwrap();
-        if let Some(dests) = self.aliases.get(&domain) {
-            if dests.iter().filter(|dest| !is_domain(dest)).count() > 0 {
-                // At least one explicit catchall-address exists!
-                return true;
-            }
-            // At this point, we need to (recursively) iterate over domain-aliases to check whether
-            // there is an exact match (or a catchall-alias for the aliased domain).
-            for dest in dests.iter().filter(|addr| is_domain(addr)) {
-                let aliased_addr = format!("{local_part}@{dest}");
-                // FIXME: This current implementation may not terminate if the configured aliases
-                // contain a loop!
-                if self.is_valid_destination(&aliased_addr) {
-                    return true;
-                }
-            }
-        }
-        // alias destination is not valid
-        false
-    }
-
-    pub fn check(&self) -> Result<(), Box<dyn Error>> {
-        // check whether all account domains exist
-        for name in self.accounts.keys() {
-            let (_, domain) = parse_address(name).unwrap();
-            if !self.domains.contains(&domain) {
-                panic!("Domain of account \"{name}\" does not exist");
-            }
-        }
-
-        // check whether aliases have corresponding accounts/domains
-        for (from, dests) in self.aliases.iter() {
-            if is_domain(from) && !self.domains.contains(from) {
-                panic!("Aliased from-domain \"{from}\" does not exist");
-            }
-            for dest in dests.iter() {
-                if is_domain(dest) && !self.domains.contains(dest) {
-                    panic!("Aliased dest-domain \"{dest}\" does not exist");
-                } else if !is_domain(dest) && !self.is_valid_destination(dest) {
-                    panic!("Aliased dest-account \"{dest}\" does not exist");
-                }
-            }
-        }
-        Ok(())
-    }
-
-    pub fn merge<P: AsRef<Path>>(&mut self, path: P) -> Result<(), Box<dyn Error>> {
-        let mut other = Config::load(path).unwrap();
-
-        for domain in self.domains.iter() {
-            if other.domains.contains(domain) {
-                return Err(
-                    "domains: Duplicate entry ({domain}) during merge detected, aborting..."
-                        .to_string()
-                        .into(),
-                );
-            }
-        }
-        self.domains.append(&mut other.domains);
-
-        for name in self.accounts.keys() {
-            if other.accounts.contains_key(name) {
-                return Err(
-                    "accounts: Duplicate entry ({name}) during merge detected, aborting..."
-                        .to_string()
-                        .into(),
-                );
-            }
-        }
-        self.accounts.extend(other.accounts);
-
-        for alias in self.aliases.keys() {
-            if other.aliases.contains_key(alias) {
-                return Err(
-                    "aliases: Duplicate entry ({alias}) during merge detected, aborting..."
-                        .to_string()
-                        .into(),
-                );
-            }
-        }
-        self.aliases.extend(other.aliases);
-
-        Ok(())
-    }
-}

pkgs/mailnix/src/dovecot.rs

@@ -1,67 +0,0 @@
-use regex::Regex;
-use std::collections::HashMap;
-use std::error::Error;
-use std::fs;
-use std::path::Path;
-
-use crate::config::{AccountConfig, Config};
-
-pub fn generate_userdb(cfg: Config) {
-    for name in cfg.accounts.into_keys() {
-        println!("{}:::::::", name);
-    }
-}
-
-pub fn generate_static_passdb(cfg: Config) {
-    let system_accounts = cfg
-        .accounts
-        .into_iter()
-        .filter(|(_, acc)| acc.is_system_user);
-    for (name, acc) in system_accounts {
-        println!("{}:{}::::::", name, acc.hashed_password);
-    }
-}
-
-fn try_load_passdb<P: AsRef<Path>>(path: P) -> Result<HashMap<String, String>, Box<dyn Error>> {
-    let mut curr_dynamic_users = HashMap::new();
-
-    if path.as_ref().exists() {
-        let re = Regex::new(r"^(?P<name>.*):(?P<hashed_password>.*)::::::$").unwrap();
-
-        let curr_passdb = fs::read_to_string(path.as_ref()).unwrap();
-        for line in curr_passdb.lines() {
-            let caps = re
-                .captures(line)
-                .unwrap_or_else(|| panic!("Regex does not match line: {line}"));
-            curr_dynamic_users.insert(
-                caps["name"].to_string(),
-                caps["hashed_password"].to_string(),
-            );
-        }
-        eprintln!("current passdb entries: {curr_dynamic_users:#?}");
-    }
-    Ok(curr_dynamic_users)
-}
-
-pub fn update_dynamic_passdb<P: AsRef<Path>>(cfg: Config, path: P) -> Result<(), Box<dyn Error>> {
-    // create hashmap of all accounts with their initial passdb-lines
-    let mut accounts: HashMap<String, AccountConfig> = cfg
-        .accounts
-        .into_iter()
-        .filter(|(_, acc)| !acc.is_system_user)
-        .collect();
-    eprintln!("settings: {:#?}", accounts);
-
-    // load current passdb and update account password hashes
-    let curr_dynamic_users = try_load_passdb(path)?;
-    for (name, hashed_password) in curr_dynamic_users.into_iter() {
-        accounts.entry(name).and_modify(|e| {
-            e.hashed_password = hashed_password;
-        });
-    }
-
-    for (name, acc) in accounts.into_iter() {
-        println!("{}:{}::::::", name, acc.hashed_password);
-    }
-    Ok(())
-}

pkgs/mailnix/src/main.rs

@@ -1,33 +0,0 @@
-mod cli;
-mod config;
-mod dovecot;
-mod postfix;
-
-use crate::{
-    cli::{Cli, Commands},
-    config::Config,
-};
-
-use clap::Parser;
-
-fn main() {
-    let args = Cli::parse();
-    let mut cfg = Config::load(args.config_path).unwrap();
-    if let Some(additional_cfg_path) = args.additional_config_path {
-        cfg.merge(additional_cfg_path).unwrap();
-    }
-    let cfg = cfg;
-    cfg.check().unwrap();
-
-    match &args.command {
-        Commands::Check => println!("Check: {:#?}", cfg),
-        Commands::GenerateUserdb => dovecot::generate_userdb(cfg),
-        Commands::GenerateStaticPassdb => dovecot::generate_static_passdb(cfg),
-        Commands::UpdateDynamicPassdb { path } => {
-            dovecot::update_dynamic_passdb(cfg, path).unwrap()
-        }
-        Commands::GenerateAliases => postfix::generate_aliases(cfg),
-        Commands::GenerateDeniedRecipients => postfix::generate_denied_recipients(cfg),
-        Commands::GenerateDomains => postfix::generate_domains(cfg),
-    }
-}

pkgs/mailnix/src/postfix.rs

@@ -1,32 +0,0 @@
-use crate::config::Config;
-
-fn prefix_domain(value: String) -> String {
-    if !value.contains("@") {
-        return format!("@{value}");
-    }
-    value
-}
-
-pub fn generate_aliases(cfg: Config) {
-    for name in cfg.accounts.into_keys() {
-        println!("{} {}", name, name);
-    }
-    for (src, dests) in cfg.aliases.into_iter() {
-        let dests: Vec<_> = dests.into_iter().map(prefix_domain).collect();
-        println!("{} {}", prefix_domain(src), dests.join(", "));
-    }
-}
-
-pub fn generate_denied_recipients(cfg: Config) {
-    let system_accounts = cfg
-        .accounts
-        .into_iter()
-        .filter(|(_, acc)| acc.is_system_user);
-    for (name, acc) in system_accounts {
-        println!("{} REJECT {}", name, acc.reject_message);
-    }
-}
-
-pub fn generate_domains(cfg: Config) {
-    println!("{}", cfg.domains.into_iter().collect::<Vec<_>>().join("\n"));
-}

tests/aliases.nix

@@ -1,6 +1,5 @@
 {pkgs, ...}:
 with (import ./common/lib.nix {inherit pkgs;}); let
-  lib = pkgs.lib;
   accounts = {
     "normal" = {
       address = "user1@example.com";
@@ -12,23 +11,32 @@ with (import ./common/lib.nix {inherit pkgs;}); let
     };
     "alias" = {
       address = "user3@example.com";
+      aliases = ["alias@example.com"];
       password = "secret-password3";
     };
+    "extra-alias" = {
+      address = "user4@example.com";
+      password = "secret-password4;";
+    };
     "multi-alias1" = {
       address = "multi-alias1@example.com";
-      password = "secret-password4;";
+      aliases = ["multi-alias@example.com"];
+      password = "secret-password5;";
     };
     "multi-alias2" = {
       address = "multi-alias2@example.com";
-      password = "secret-password5;";
+      aliases = ["multi-alias@example.com"];
+      password = "secret-password6;";
     };
     "catchall" = {
       address = "catchall@example.com";
-      password = "secret-password6;";
+      aliases = ["@example.com"];
+      password = "secret-password7;";
     };
     "otherdomain" = {
       address = "otherdomain@example.com";
-      password = "secret-password7;";
+      aliases = ["user@otherdomain.com"];
+      password = "secret-password8;";
     };
   };
 in
@@ -42,14 +50,11 @@ in
           fqdn = "mail.example.com";
           domains = ["example.com" "aliased.com" "otherdomain.com"];
           accounts = mkAccounts accounts;
-          virtualAliases = {
+          virtualDomainAliases = {
-            # domain aliases
             "aliased.com" = "example.com";
-            # account aliases
+          };
-            "alias@example.com" = accounts."alias".address;
+          extraVirtualAliases = {
-            "multi-alias@example.com" = lib.map (x: accounts.${x}.address) ["multi-alias1" "multi-alias2"];
+            "extra-alias@example.com" = accounts."extra-alias".address;
-            "example.com" = accounts."catchall".address;
-            "user@otherdomain.com" = accounts."otherdomain".address;
           };
         };
       };
@@ -66,6 +71,7 @@ in
       };
       sendMail = mkSendMail smtpSettings accounts;
       recvMail = mkRecvMail serverAddr accounts;
+      cfg = nodes.server.mailsystem;
     in ''
       start_all()
 
@@ -177,6 +183,18 @@ in
           # fetchmail returns EXIT_CODE 0 when it retrieves mail
           client.succeed("${recvMail "otherdomain"} >&2")
 
+      with subtest("mail incoming on extraVirtualAlias"):
+          client.succeed("${sendMail "normal" "" "extra-alias@example.com" ''
+        Subject: extraVirtualAliases-Test
+
+        Hello User4,
+        this is mail is sent to you by using an extraVirtualAlias as recipient.
+      ''}")
+          server.wait_until_fails('${pendingPostqueue}')
+          client.execute("${cleanupMail}")
+          # fetchmail returns EXIT_CODE 0 when it retrieves mail
+          client.succeed("${recvMail "extra-alias"} >&2")
+
       with subtest("receiving mail on aliased domain using normal account"):
           client.succeed("${sendMail "normal" "" "user2@aliased.com" ''
         Subject: aliasedDomain with normal account

tests/basic.nix

@@ -9,11 +9,6 @@ with (import ./common/lib.nix {inherit pkgs;}); let
       address = "user2@example.com";
       password = "secret-password2";
     };
-    "system" = {
-      address = "system@example.com";
-      password = "secret-password3";
-      isSystemUser = true;
-    };
   };
 in
   pkgs.nixosTest {
@@ -82,27 +77,6 @@ in
         I'm pretending to be someotheraddress@example.com and the mailserver should reject this attempt.
       ''}")
 
-      with subtest("send succeeds for system user"):
-          client.succeed("${sendMail "system" "" accounts."normal".address ''
-        Subject: Testmail2
-
-        Hello User1,
-        this is some text!
-      ''}")
-          # give the mail server some time to process the mail
-          server.wait_until_fails('${pendingPostqueue}')
-
-      with subtest("mail can be retrieved via imap"):
-          client.succeed("${recvMail "normal"} >&2")
-
-      with subtest("mail sent to system-account is rejected"):
-          client.fail("${sendMail "normal" "someotheraddress@example.com" accounts."system".address ''
-        Subject: Mail to system-account
-
-        Hello System user,
-        this mail should never reach you as it should be rejected by postfix.
-      ''}")
-
       with subtest("server issues no warnings nor errors"):
           ${checkLogs "server"}
     '';

tests/common/lib.nix

@@ -2,7 +2,7 @@
   lib = pkgs.lib;
 in rec {
   waitForRspamd = node: let
-    inherit (import ../../mailsystem/common.nix {inherit (node) config pkgs;}) rspamdProxySocket;
+    inherit (import ../../mailsystem/common.nix {inherit (node) config;}) rspamdProxySocket;
   in "set +e; timeout 1 ${node.nixpkgs.pkgs.netcat}/bin/nc -U ${rspamdProxySocket} < /dev/null; [ $? -eq 124 ]";
 
   mkHashedPasswordFile = password:

tests/common/server.nix

@@ -1,26 +1,13 @@
-{lib, ...}: {
+{...}: {
   imports = [./../../mailsystem];
   config = {
     virtualisation.memorySize = 1024;
     mailsystem = {
       enable = true;
+
+      roundcube.enable = false;
+      rspamd.webUi.enable = false;
       certificateScheme = "selfsigned";
     };
-
-    # Prevent tests deadlocking on DNS requests which will never succeed.
-    services.rspamd.locals."options.inc".text = ''
-      dns {
-        nameservers = ["127.0.0.1"];
-        timeout = 0.0s;
-        retransmits = 0;
-      }
-    '';
-
-    # Enable more verbose logging (required for, e.g., sieve testing)
-    services.dovecot2.extraConfig = lib.mkAfter ''
-      mail_debug = yes
-      auth_debug = yes
-      verbose_ssl = yes
-    '';
   };
 }

tests/rspamd.nix

@@ -1,178 +0,0 @@
-{pkgs, ...}:
-with (import ./common/lib.nix {inherit pkgs;}); let
-  lib = pkgs.lib;
-  accounts = {
-    "normal" = {
-      address = "user@example.com";
-      password = "secret-password1";
-    };
-    "normal2" = {
-      address = "user@example.org";
-      password = "secret-password2;";
-    };
-  };
-  genDkimSecret = domain: name: type:
-    pkgs.runCommand "mk-dkim-secrets-${domain}-${selector}" {
-      buildInputs = [pkgs.rspamd];
-      inherit domain name type;
-    } ''
-      rspamadm dkim_keygen -d $domain -s $name -t $type ${lib.optionalString (type == "rsa") "-b 2048"} -k $out
-    '';
-
-  mkDkimSettings = domains: selectors:
-    lib.listToAttrs (
-      map (domain:
-        lib.nameValuePair domain (map (entry: {
-            selector = entry.name;
-            keyFile = genDkimSecret domain entry.name entry.type;
-          })
-          selectors))
-      domains
-    );
-in
-  pkgs.nixosTest {
-    name = "rspamd";
-    nodes = {
-      server = {pkgs, ...}: {
-        imports = [./common/server.nix];
-        mailsystem = {
-          fqdn = "mail.example.com";
-          domains = ["example.com" "example.org"];
-          accounts = mkAccounts accounts;
-          dkimSettings = mkDkimSettings ["example.com" "example.org"] [
-            {
-              name = "elliptic";
-              type = "ed25519";
-            }
-            {
-              name = "selector";
-              type = "rsa";
-            }
-          ];
-        };
-      };
-      client = {...}: {
-        imports = [./common/client.nix];
-      };
-    };
-    testScript = {nodes, ...}: let
-      cfg = nodes.server.mailsystem;
-      serverAddr = nodes.server.networking.primaryIPAddress;
-      clientAddr = nodes.client.networking.primaryIPAddress;
-      smtpSettings = {
-        address = serverAddr;
-        port = 465;
-      };
-      sendMail = mkSendMail smtpSettings accounts;
-      recvMail = mkRecvMail serverAddr accounts;
-      test-mark-spam = accountName:
-        pkgs.writeScript "imap-mark-spam" ''
-          #!${pkgs.python3.interpreter}
-          import imaplib
-
-          with imaplib.IMAP4_SSL('${serverAddr}') as imap:
-            imap.login('${accounts."${accountName}".address}', '${accounts."${accountName}".password}')
-            imap.select()
-            status, [response] = imap.search(None, 'ALL')
-            msg_ids = response.decode("utf-8").split(' ')
-            print(msg_ids)
-            assert status == 'OK'
-            assert len(msg_ids) == 1
-
-            imap.copy(','.join(msg_ids), 'Junk')
-            for num in msg_ids:
-              imap.store(num, '+FLAGS', '\\Deleted')
-            imap.expunge()
-
-            imap.select('Junk')
-            status, [response] = imap.search(None, 'ALL')
-            msg_ids = response.decode("utf-8").split(' ')
-            print(msg_ids)
-            assert status == 'OK'
-            assert len(msg_ids) == 1
-
-            imap.close()
-        '';
-      test-mark-ham = accountName:
-        pkgs.writeScript "imap-mark-ham" ''
-          #!${pkgs.python3.interpreter}
-          import imaplib
-
-          with imaplib.IMAP4_SSL('${serverAddr}') as imap:
-            imap.login('${accounts."${accountName}".address}', '${accounts."${accountName}".password}')
-            imap.select('Junk')
-            status, [response] = imap.search(None, 'ALL')
-            msg_ids = response.decode("utf-8").split(' ')
-            print(msg_ids)
-            assert status == 'OK'
-            assert len(msg_ids) == 1
-
-            imap.copy(','.join(msg_ids), 'INBOX')
-            for num in msg_ids:
-              imap.store(num, '+FLAGS', '\\Deleted')
-            imap.expunge()
-
-            imap.select('INBOX')
-            status, [response] = imap.search(None, 'ALL')
-            msg_ids = response.decode("utf-8").split(' ')
-            print(msg_ids)
-            assert status == 'OK'
-            assert len(msg_ids) == 1
-
-            imap.close()
-        '';
-    in ''
-      start_all()
-
-      server.wait_for_unit("multi-user.target")
-      client.wait_for_unit("multi-user.target")
-      server.wait_until_succeeds("${waitForRspamd nodes.server}")
-
-      with subtest("rspamd configuration is valid"):
-          server.succeed("${pkgs.rspamd}/bin/rspamadm configtest >&2")
-
-      with subtest("rspamd rejects spam"):
-          client.fail("${sendMail "normal" "" accounts."normal2".address ''
-        Subject: GTUBE-Test
-
-        Hello User2,
-        this is a mail containing a GTUBE pattern that should result in the rejection of this mail.
-
-        XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X
-      ''}")
-
-      with subtest("imap sieve junk trainer"):
-          client.succeed("${sendMail "normal" "" accounts."normal2".address ''
-        Subject: Testmail
-
-        Hello User2,
-        this is a testmail.
-      ''}")
-          server.wait_until_fails('${pendingPostqueue}')
-
-          client.succeed("${test-mark-spam "normal2"} >&2")
-          server.wait_until_succeeds("journalctl -u dovecot2 | grep -i learn-spam.sh >&2")
-          server.fail("journalctl -u dovecot2 | grep -i learn-spam.sh | grep -i error >&2")
-
-          client.succeed("${test-mark-ham "normal2"} >&2")
-          server.wait_until_succeeds("journalctl -u dovecot2 | grep -i learn-ham.sh >&2")
-          server.fail("journalctl -u dovecot2 | grep -i learn-ham.sh | grep -i error >&2")
-
-      with subtest("dkim signing"):
-          client.succeed("${sendMail "normal2" "" accounts."normal".address ''
-        Subject: Testmail
-
-        Hello User1,
-        this is also a testmail.
-      ''}")
-          server.wait_until_fails('${pendingPostqueue}')
-          client.execute("${cleanupMail}")
-          # fetchmail returns EXIT_CODE 0 when it retrieves mail
-          client.succeed("${recvMail "normal"} >&2")
-
-          client.succeed("cat ~/mail/* >&2")
-          # make sure the mail has all configured dkim signatures
-          client.succeed("grep ${(builtins.elemAt cfg.dkimSettings."example.com" 0).selector} ~/mail/*")
-          client.succeed("grep ${(builtins.elemAt cfg.dkimSettings."example.com" 1).selector} ~/mail/*")
-    '';
-  }