Hi I have an issue where * A client sends an email to a remote server * and cc's a copy to someone else
under these circumstance I get: delivery 3555: deferral: <ip>_does_not_like_recipient./Remote_host_said:_451_relay_not_permitted!/Giving_up_on_<ip>./ it does eventually go through but the delay is several hours * If I test without the CC it goes through straight away * The CC'ed mail is delivered staright away * it only affects this server Their server has a signature if this helps: * signature spamexpert-2.servers.netregistry.net ESMTP Exim 20200825.1020 Thu, 03 Sep 2020 06:57:02 +0300 Cheers David Bray e. da...@brayworth.com