Started working on mail server

system/server/mail.nix

@@ -0,0 +1,87 @@
+{config, ...}: {
+  services.stalwart-mail = {
+    enable = true;
+    openFirewall = true;
+    settings = {
+      server = {
+        hostname = "mx1.jsw.tf";
+        tls = {
+          enable = true;
+          implicit = true;
+        };
+        listener = {
+          smtp = {
+            protocol = "smtp";
+            bind = "[::]:25";
+          };
+          submissions = {
+            bind = "[::]:465";
+            protocol = "smtp";
+          };
+          imaps = {
+            bind = "[::]:993";
+            protocol = "imap";
+          };
+          jmap = {
+            bind = "[::]:8080";
+            url = "https://mail.jsw.tf";
+            protocol = "jmap";
+          };
+          management = {
+            bind = ["127.0.0.1:8080"];
+            protocol = "http";
+          };
+        };
+      };
+      lookup.default = {
+        hostname = "mx1.jsw.tf";
+        domain = "jsw.tf";
+      };
+      acme."letsencrypt" = {
+        directory = "https://acme-v02.api.letsencrypt.org/directory";
+        challenge = "dns-01";
+        contact = "jswmail@proton.me";
+        domains = ["jsw.tf" "mx1.jsw.tf"];
+        provider = "cloudflare";
+        secret = "%{file:${config.age.secrets.cloudflare-acme.path}}%";
+      };
+      session.auth = {
+        mechanisms = "[plain]";
+        directory = "'in-memory'";
+      };
+      storage.directory = "in-memory";
+      session.rcpt.directory = "'in-memory'";
+      queue.outbound.next-hop = "'local'";
+      directory."imap".lookup.domains = ["jsw.tf"];
+      # directory."in-memory" = {
+      #   type = "memory";
+      #   principals = [
+      #     {
+      #       class = "individual";
+      #       name = "User 1";
+      #       secret = "%{file:/etc/stalwart/mail-pw1}%";
+      #       email = [""];
+      #     }
+      #   ];
+      # };
+      authentication.fallback-admin = {
+        user = "admin";
+        secret = "%{file:${config.age.secrets.password.path}}%";
+      };
+    };
+  };
+
+  services.caddy.virtualHosts = {
+    "webadmin.jsw.tf" = {
+      extraConfig = ''
+        reverse_proxy http://127.0.0.1:8080
+      '';
+      serverAliases = [
+        "mta-sts.example.org"
+        "autoconfig.example.org"
+        "autodiscover.example.org"
+        "mail.example.org"
+      ];
+    };
+  };
+}