diff --git a/data/conf/postfix/master.cf b/data/conf/postfix/master.cf
index 6d374e67..89ba5dd9 100644
--- a/data/conf/postfix/master.cf
+++ b/data/conf/postfix/master.cf
@@ -34,6 +34,7 @@ submission inet n       -       n       -       -       smtpd
 
 # used to reinject quarantine mails
 590 inet n      -       n       -       -       smtpd
+  -o smtpd_helo_restrictions=
   -o smtpd_client_restrictions=permit_mynetworks,reject
   -o smtpd_tls_auth_only=no
   -o smtpd_milters=