Re: [exim] Weird error showing up in mainlog

On 2017-11-24, Jeremy Harris <jgh@???> wrote:
> 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.

It's rejected after "MAIL FROM" it can only be the envelope from as
they haven't seen any headers.

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