{{tag>[centos7 linux iredmail]}}

=====iRedMail - helo reject=====
Reject reason:
//Helo command rejected: ACCESS DENIED. Your email was rejected because the sending mail server does not identify itself correctly (.local);//

  * Edit /etc/postfix/helo_access.pcre if needed.
  * Restart postfix.


__Quote from forum:__\\
It means your client's MTA uses a FQDN hostname which ends with '.local' as HELO identity.

'.local' is not a valid top domain name, and all mail servers should use a valid domain name.
You have two solutions:

  * Ask your client to change their HELO identity which sent by MTA to a valid one.
  * Remove this HELO check rule on YOUR server, in file /etc/postfix/helo_access.pcre.

Personally, i suggest you try #1 first.