Helo command rejected: need fully-qualified hostname

[shephost]

How do I configure MailEnable to use a fully-qualified host name in the SMTP HELO command?

My email users are getting the following error message:

Message delivery has been delayed to the following recipients:
Recipient: [SMTP:user@domain.com]
Reason: Remote SMTP Server Returned: 504 5.5.2 <hostname>: Helo command rejected: need fully-qualified hostname
421 4.4.2 host.domain.com Error: timeout exceeded

Anyone know how to fix this?

 

[mbeijen]

Anybody any info on this one? I have the same problem. This only seems to happen to one specific domain, however on my linux boxes no problems.

 

[abdi]

vim /etc/postfix/main.cf

smtpd_helo_restrictions = permit_mynetworks,
# reject_non_fqdn_hostname,
reject_invalid_hostname,
permit

/etc/init.d/postfix restart