[GRLUG] Postfix HELO issue

[Grand Rapids Linux Users Group]

On Thu, 5 Aug 2021, Grand Rapids Linux Users Group wrote:

> What is your sender SMTP sending as for HELO ?
>
> "fully qualified" means the receiver is expecting a full host and domain
> name.
>
Ahh, .. same error on the receiving MTA:

connect from majordomo.mailman.dd.org[24.38.28.134]
Aug  5 13:14:10 mx2 postfix/smtpd[13410]: NOQUEUE: reject: RCPT from
majordomo.mailman.dd.org[24.38.28.134]: 504 <majordomo>: Helo command
rejected: need fully-qualified hostname; from=<postorius at mailman.dd.org>
to=<lvl at omnitec.net> proto=ESMTP helo=<majordomo>
Aug  5 13:14:10 mx2 postfix/smtpd[13410]: disconnect from
majordomo.mailman.dd.org[24.38.28.134]

Have never used a subdomain before, ... but that is what they wanted.

	Thanks!!