diff --git a/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf b/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf
index b3c0adda..ec2d2300 100644
--- a/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf
+++ b/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf
@@ -38,10 +38,12 @@ filter f_mail { facility(mail); };
 filter f_overrides { not match("overriding earlier entry" value("MESSAGE")); };
 # end
 filter f_skip_local { not facility (local0, local1, local2, local3, local4, local5, local6, local7); };
+filter f_checks { not match("TLS SNI from checks.mailcow.email" value("MESSAGE")); };
 log {
   source(s_src);
   filter(f_skip_local);
   filter(f_overrides);
+  filter(f_checks);
   destination(d_stdout);
   filter(f_mail);
   destination(d_redis_ui_log);
diff --git a/data/Dockerfiles/postfix/syslog-ng.conf b/data/Dockerfiles/postfix/syslog-ng.conf
index 3bec39ec..1ee55b88 100644
--- a/data/Dockerfiles/postfix/syslog-ng.conf
+++ b/data/Dockerfiles/postfix/syslog-ng.conf
@@ -38,10 +38,12 @@ filter f_mail { facility(mail); };
 filter f_overrides { not match("overriding earlier entry" value("MESSAGE")); };
 # end
 filter f_skip_local { not facility (local0, local1, local2, local3, local4, local5, local6, local7); };
+filter f_checks { not match("TLS SNI from checks.mailcow.email" value("MESSAGE")); };
 log {
   source(s_src);
   filter(f_skip_local);
   filter(f_overrides);
+  filter(f_checks);
   destination(d_stdout);
   filter(f_mail);
   destination(d_redis_ui_log);