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Topic: Helo command rejected: ACCESS DENIED

==== Required information ====
- iRedMail version: 1.8.1
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Debian 7
- Related log if you're reporting an issue:
====

Hello
A client receives the following error message when sending me an email:
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<SRVGPE-WMA002.expgpe.local>: Helo command rejected: ACCESS DENIED. Your email was rejected because the sending mail server does not identify itself correctly (.local)
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Thank you!

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Re: Helo command rejected: ACCESS DENIED

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:

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

Personally, i suggest you try #1 first.