gerd.stalward: added stalwart mailserver

machines/gerd.nix

@@ -16,9 +16,7 @@
     ./gerd/services/hedgedoc.nix
     ./gerd/services/cyberchef.nix
     ./gerd/services/nextcloud.nix
-
+    ./gerd/services/stalwart.nix
-
-    # ./gerd/services/owncast.nix
   ];
 
   networking.hostName = "gerd";
@@ -32,6 +30,7 @@
         "safe/svcs/forgejo" = { mountpoint = "/srv/forgejo"; extra.options.quota = "5G"; };
         "safe/svcs/hedgedoc" = { mountpoint = "/srv/hedgedoc"; extra.options.quota = "5G"; };
         "safe/svcs/nextcloud" = { mountpoint = "/srv/nextcloud"; extra.options.quota = "5G"; };
+        "safe/svcs/stalwart" = { mountpoint = "/srv/stalwart"; extra.options.quota = "5G"; };
       };
     };
 

machines/gerd/services/stalwart.nix

@@ -0,0 +1,143 @@
+{ config, lib, pkgs, ... }:
+
+let
+  svc_domain = "mail.${config.mine.shared.settings.domain}";
+  svc_domain_smtp = "smtp.${config.mine.shared.settings.domain}";
+  svc_domain_imap = "imap.${config.mine.shared.settings.domain}";
+
+  ports = {
+    smtp = 25;
+    submissions = 465;
+    imaptls = 993;
+
+    http_management = 7377;
+  };
+
+  # place data into own zfs dataset
+  stateDir = config.mine.zfsMounts."rpool/safe/svcs/stalwart";
+
+  # user/group
+  stalwart_user = config.users.users.stalwart-mail.name;
+  stalwart_group = config.users.groups.stalwart-mail.name;
+
+  certLocation = config.security.acme.certs."${svc_domain}".directory;
+in {
+  services.stalwart-mail = {
+    enable = true;
+    openFirewall = true;
+    # package = pkgs.stalwart-mail;
+
+    settings = {
+      lookup.default.hostname = svc_domain;
+
+      # tracer.stdout.level = "trace";
+      store.db.path = "${stateDir}/db";
+
+      directory.ldap = {
+        type = "ldap";
+        url = config.mine.shared.settings.ldap.url;
+        base-dn = config.mine.shared.settings.ldap.dc;
+        tls.enable = false;
+
+        bind = {
+          dn = config.mine.shared.settings.ldap.bind_dn;
+          secret = "%{file:${config.age.secrets.lldap-bind-user-pass.path}}%";
+
+          auth = {
+            enable = true;
+            dn = "cn=?,${config.mine.shared.settings.ldap.search_base}";
+          };
+        };
+
+        filter = let
+          _mkFilter = attrs: ph: config.mine.shared.lib.ldap.mkFilter (lconfig: llib:
+            llib.mkAnd [
+              (llib.mkGroup lconfig.groups.member)
+              (llib.mkOr (lib.forEach attrs (v: llib.mkSearch v ph)))
+            ]
+          );
+
+          attrs = config.mine.shared.settings.ldap.attr // { emailAlias = "mailAlias"; emailList = "mailList"; };
+        in {
+          name = _mkFilter [ attrs.uid ] "?";
+          email = _mkFilter [ attrs.email attrs.emailAlias attrs.emailList ] "?";
+          verify = _mkFilter [ attrs.email attrs.emailAlias ] "*?*";
+          expand = _mkFilter [ attrs.emailList ] "?";
+          domains = _mkFilter [ attrs.email attrs.emailAlias ] "*@?";
+        };
+
+        attributes = {
+          name = "uid";
+          class = "objectClass";
+          description = "givenName";
+          secret = "uid";
+          groups = "memberOf";
+          email = "mail";
+          # email-alias = "mailAlias";
+          # quota = "diskQuota";
+        };
+        
+      };
+
+      storage.directory = "ldap";
+
+      # listeners
+      server.listener = {
+        smtp = { bind = [ "[::]:${builtins.toString ports.smtp}"]; protocol = "smtp"; };
+        submissions = { bind = [ "[::]:${builtins.toString ports.submissions}"]; protocol = "smtp"; tls.implicit = true; };
+        imaptls = { bind = [ "[::]:${builtins.toString ports.imaptls}"]; protocol = "imap"; tls.implicit = true; };
+
+        management = { bind = [ "127.0.0.1:${builtins.toString ports.http_management}" ]; protocol = "http"; };
+      };
+
+      certificate.domain = {
+        cert = "%{file:${certLocation + "/cert.pem"}}%";
+        private-key = "%{file:${certLocation + "/key.pem"}}%";
+      };
+
+      server.tls = {
+        certificate = "domain";
+        enable = true;
+        implicit = true;
+      };
+
+      # authentication
+      authentication.fallback-admin = {
+        user = "admin";
+        secret = "%{file:${config.age.secrets.stalwart-admin-fallback-password.owner}}%";
+      };
+    };
+  };
+
+  # setup so that stalwart can access and write to the directory
+  systemd.services.stalwart-mail.serviceConfig.ReadWritePaths = [ stateDir ];
+  systemd.tmpfiles.rules = [
+    "Z ${stateDir} 0700 ${stalwart_user} ${stalwart_group} -"
+  ];
+
+  # setup certs
+  services.nginx.virtualHosts."${svc_domain}" = {
+    forceSSL = true;
+    enableACME = true;
+    serverAliases = [ svc_domain_smtp svc_domain_imap ];
+    root = pkgs.writeTextDir "index.html" "Nothing.";
+  };
+
+  # need to change group to stalwart-mail for cert + add nginx to stalwart-mail group to do HTTP ACME
+  users.users.nginx.extraGroups = [ stalwart_group ];
+  security.acme.certs."${svc_domain}".group = stalwart_group;
+
+
+  # setup secrets for stalwart
+  # setup access to ldap bind user credential
+  users.groups.secrets-lldap-bind-user-pass.members = [ stalwart_user ];
+  age.secrets.stalwart-admin-fallback-password.owner = stalwart_user;
+
+  mine.shared.settings.mail = {
+    domain = svc_domain;
+    domain_smtp = svc_domain_smtp;
+    domain_imap = svc_domain_imap;
+
+    ports = ports;
+  };
+}

secrets/default.nix

@@ -31,6 +31,9 @@
     # nextcloud
     nextcloud-admin-pass.file = ./nextcloud/admin-pass.age;
     nextcloud-secrets.file = ./nextcloud/secrets.age;
+
+    # stalwart
+    stalwart-admin-fallback-password.file = ./stalwart/admin-fallback-password.age;
   };
 
   users.groups.secrets-lldap-bind-user-pass = {};

secrets/secrets.nix

@@ -35,4 +35,7 @@ in
   # nextcloud
   "nextcloud/admin-pass.age".publicKeys = defaultAccess;
   "nextcloud/secrets.age".publicKeys = defaultAccess;
+
+  # mailserver/stalwart
+  "stalwart/admin-fallback-password.age".publicKeys = defaultAccess;
 }

secrets/stalwart/admin-fallback-password.age

@@ -0,0 +1,9 @@
+age-encryption.org/v1
+-> ssh-ed25519 QSDXqg KxP3cNdqRorj0JO6SW3FOjcFxgmsspRz/MKnVVviXFM
+i9SoYa0sQ0E7S2jo9Js5PJsiHB3lMsVqX5bULg255bw
+-> ssh-ed25519 n8n9DQ BrcbGW2zt6E5QjRz+kN/5vl4AreGuOsR+AUcv8sog3M
+c+nUCQ9Bifu3bK4R2OgKLbfFFU66/73Oj4y9bMTVJIU
+-> ssh-ed25519 BTp6UA RngU7oNTzWJRZG6Qr/t9RiAxEeBelHIzOuSp44b3HVc
+DUrunTXLwjLqkuiuzksaqpSwvmKpps/I6Jftv0dD6p8
+--- D75A1a96Q1UKHUsAejeydmjqui9+P3e6fRo3Eeb1I0g
+··çu<> éì>ÝÄ_owxîuýªÓê'<27>ÿ Ÿ7Ÿì?[À5dGTq✛ò¼B¼]0_‡·(Íç:Ķ

shared/sources/default.nix

@@ -13,6 +13,11 @@ in sources // {
         url = "https://github.com/NixOS/nixpkgs/pull/334590.patch";
         sha256 = "sha256-5Uf/jLV0CJFbWyPmkpF4kEVISvoG+fujvTAFIR0a2ek=";
       })
+      # stalwart-mail
+      (pkgs.fetchpatch {
+        url = "https://github.com/NixOS/nixpkgs/pull/333507.patch";
+        sha256 = "sha256-HAbfKQRnOjdK/rJ5wuePw4hEVQoFz9N0YujxBxROGo0=";
+      })
     ];
   };
 }