1 files changed, 1 insertions, 1 deletions

diff --git a/hel.nix b/hel.nix
index ca43426b..68c3040a 100644
--- a/hel.nix
+++ b/hel.nix
@@ -202,7 +202,7 @@
 
         smtp_sender_dependent_authentication = yes
         sender_dependent_relayhost_maps = regexp:${pkgs.writeText "sender_relay" ''
-          @math(ematik)?\.(lmu|uni-muenchen)\.de [uni-muenchen.de]
+          /@math(ematik)?\.(lmu|uni-muenchen)\.de$/ [uni-muenchen.de]
         ''}
         smtp_sasl_password_maps = texthash:/var/db/postfix/conf/sasl_passwd
         smtp_sasl_type = cyrus