Topic: Problem mailing between two domains hosted on same system
==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Ubuntu 12.04.4 LTS
I have multiple domains set up in my iRedMail system. let's call them abc.com and cba.com. When I try to send mail from abc.com to cba.com, I am given an error that says:
"An error occurred while sending mail. The mail server responded: 5.7.1 <firstname.lastname@example.org>: Recipient address rejected: Invalid HELO/EHLO; HRP limit exceeded. Please check the message recipient email@example.com and try again."
I've validated that the user IS a valid user so that's not the problem and the problem does not occur if I try to mail from cba.com to abc.com.
Can anyone tell me what I might be doing wrong or how I can fix this?