diff --git a/mastus/letsencrypt.nix b/mastus/letsencrypt.nix
index a25fc02..b2839a2 100644
--- a/mastus/letsencrypt.nix
+++ b/mastus/letsencrypt.nix
@@ -18,6 +18,7 @@
 
       postRun = ''
         systemctl reload nginx
+        systemctl reload postfix
         systemctl restart dovecotSslKey
         systemctl reload dovecot2
       '';