diff --git a/mail-server/dovecot.nix b/mail-server/dovecot.nix
index fed2189..929fcac 100644
--- a/mail-server/dovecot.nix
+++ b/mail-server/dovecot.nix
@@ -136,6 +136,7 @@ in
         }
 
         plugin {
+          reipient_delmiter = +
           sieve_plugins = sieve_imapsieve sieve_extprograms
           sieve = file:/var/sieve/%u/scripts;active=/var/sieve/%u/active.sieve
           sieve_default = file:/var/sieve/%u/default.sieve
diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index 19f5e52..b55a8ce 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -134,7 +134,7 @@ in
       ''
         # Extra Config
         mydestination =
-
+        recipient_delimiter = +
         smtpd_banner = ${fqdn} ESMTP NO UCE
         disable_vrfy_command = yes
         message_size_limit = ${builtins.toString cfg.messageSizeLimit}