Re: [exim] Weird error showing up in mainlog

On 24/11/17 03:30, The Doctor wrote:
> 2017-11-23 13:00:00 1eHxbt-0008Sf-2W ** {legit e-mail address} R=dnslookup T=remote_smtp H=doctor.nl2k.ab.ca [204.209.81.1] X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no: SMTP error from remote mail server after pipelined MAIL FROM:<root> SIZE=13880523: 501 <root>: sender address must contain a domain
>
> What is happening?

A remote system that you are trying to send a mail to, is rejecting that
message. The tail end of that log line, starting "501", is what they
said.

My interpretation of what they said is that they don't like one of
- the envelope from
- the header From: (or possibly Sender:)
but you'd need to verify their policies by asking them.
--
Jeremy