applications/email.nix

@@ -92,7 +92,7 @@ with lib; let
     }
   ];
 
-  configFile =
+  sieveConfigFile =
     # https://doc.dovecot.org/configuration_manual/sieve/examples/#plus-addressed-mail-filtering
     pkgs.writeText "basic_sieve"
     ''
@@ -105,17 +105,32 @@ with lib; let
 
       # this should be close to teh last step
       if allof (
-          address  :localpart ["To"] ["${toString create_config_to}"],
-          address  :domain ["To"] "skynet.ie"
-          ){
-          if address :matches ["To"] "*@skynet.ie" {
-            if header :is "X-Spam" "Yes" {
-              fileinto :create "''${1}.Junk";
-              stop;
-            } else {
-              fileinto :create "''${1}";
-            }
+        address  :localpart ["To", "Cc"] ["${toString create_config_to}"],
+        address  :domain ["To", "Cc"] "skynet.ie"
+        ){
+        if address :matches ["To", "Cc"] "*@skynet.ie" {
+          if header :is "X-Spam" "Yes" {
+            fileinto :create "''${1}.Junk";
+            stop;
+          } else {
+            fileinto :create "''${1}";
+            stop;
           }
+        }
+      }
+      if allof (
+        address  :localpart ["From"] ["${toString create_config_to}"],
+        address  :domain ["From"] "skynet.ie"
+        ){
+        if address :matches ["From"] "*@skynet.ie" {
+          if header :is "X-Spam" "Yes" {
+            fileinto :create "''${1}.Junk";
+            stop;
+          } else {
+            fileinto :create "''${1}";
+            stop;
+          }
+        }
       }
     '';
 in {
@@ -462,7 +477,40 @@ in {
     };
 
     services.dovecot2.sieve.scripts = {
-      before = configFile;
+      before = sieveConfigFile;
+    };
+
+    # This is to add a bcc to outgoing mail
+    # this then interacts with teh filters to put it in the right folder
+    # we can directly add to the postfix service here
+    services.postfix = let
+      # mostly copied from the upstream mailserver config/functions
+      mappedFile = name: "hash:/var/lib/postfix/conf/${name}";
+
+      sender_bcc_maps_file = let
+        content = lookupTableToString create_skynet_service_bcc;
+      in
+        builtins.toFile "sender_bcc_maps" content;
+
+      lookupTableToString = attrs: let
+        valueToString = value: lib.concatStringsSep ", " value;
+      in
+        lib.concatStringsSep "\n" (lib.mapAttrsToList (name: value: "${name} ${valueToString value}") attrs);
+
+      # convert the mailboxes config to something that can be used here
+      create_skynet_email_bcc = mailbox: {
+        name = "${mailbox}@skynet.ie";
+        value = ["${mailbox}@skynet.ie"];
+      };
+      create_skynet_service_bcc = builtins.listToAttrs (map (mailbox: (create_skynet_email_bcc mailbox.account)) service_mailboxes);
+    in {
+      mapFiles."sender_bcc_maps" = sender_bcc_maps_file;
+
+      config = {
+        sender_bcc_maps = [
+          (mappedFile "sender_bcc_maps")
+        ];
+      };
     };
 
     # tune the spam filter