diff --git a/config/filter.d/sendmail-reject.conf b/config/filter.d/sendmail-reject.conf
index 985eac8b..dd58f3e7 100644
--- a/config/filter.d/sendmail-reject.conf
+++ b/config/filter.d/sendmail-reject.conf
@@ -32,7 +32,7 @@ cmnfailre = ^ruleset=check_rcpt, arg1=(?P<email><\S+@\S+>), relay=(\S+ )?\[(?:IP
 
 mdre-normal =
 
-mdre-extra = ^(?:\S+ )?\[(?:IPv6:<IP6>|<IP4>)\](?: \(may be forged\))? did not issue (?:[A-Z]{4}[/ ]?)+during connection to M(?:TA|SP)(?:-\w+)?$
+mdre-extra = ^(?:\S+ )?\[(?:IPv6:<IP6>|<IP4>)\](?: \(may be forged\))? did not issue (?:[A-Z]{4}[/ ]?)+during connection to (?:TLS)?M(?:TA|SP|SA)(?:-\w+)?$
 
 mdre-aggressive = %(mdre-extra)s