postfix: fix recipient_delimiter option

This reverts commit 88f4b75a00855c878624e465e1a83930aaa92858 and fixes the
recipientDelimiter config option. Till then the camel case variant was used
while recipient_delimiter would have been right.

1 files changed, 10 insertions, 0 deletions

diff --git a/nixos/modules/services/mail/postfix.nix b/nixos/modules/services/mail/postfix.nix
index 3d9bb9ccf24c..29e0cf7a8829 100644
--- a/nixos/modules/services/mail/postfix.nix
+++ b/nixos/modules/services/mail/postfix.nix
@@ -77,6 +77,8 @@ let
       smtpd_tls_key_file = ${cfg.sslKey}
 
       smtpd_use_tls = yes
+
+      recipient_delimiter = ${cfg.recipientDelimiter}
     ''
     + optionalString (cfg.virtual != "") ''
       virtual_alias_maps = hash:/etc/postfix/virtual
@@ -289,6 +291,14 @@ in
         description = "SSL key to use.";
       };
 
+      recipientDelimiter = mkOption {
+        default = "";
+        example = "+";
+        description = "
+          Delimiter for address extension: so mail to user+test can be handled by ~user/.forward+test
+        ";
+      };
+
       virtual = mkOption {
         default = "";
         description = "