[Postfix] Do not log tls sni maps errors from connections initiated by mailcow checks

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);

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);