On Thu, 25 Apr 2024, Paul Menzel via mailop wrote:
Dear mail operators,
Until now we rejected emails from donotre...@invoices.premierinn.de
2024-04-23.log:2024-04-23 17:48:53 194.95.238.12 <22>Apr 23 17:48:53
mgw6-erl postfix/smtpd[744016]: NOQUEUE: reject: RCPT from
fra-smtp2.oracleindustry.com[138.1.67.161]:19102: 554 5.1.8
<donotre...@invoices.premierinn.de>: Sender address rejected: Domain not
found; from=<donotre...@invoices.premierinn.de> to=<u...@molgen.mpg.de>
proto=ESMTP helo=<fra-smtp2.oracleindustry.com>
because the return path would not work.
$ host invoices.premierinn.de
$
Should someone here not know, RFC 7505
A "Null MX" No Service Resource Record for Domains That Accept No Mail
is the accepted standard way to signal a domain that does not receive email.
By using the MX records suggested there, a recipient would know
that the sender acknowledges sending mail from that domain.
Additionally, postmas...@premierinn.de also does not work:
(connect to relay2.netnames.net[185.26.230.89]:25: Connection timed
out)
postmas...@premierinn.de
(No idea, if it’s some kind of greylisting. Unlikely as I sent it 80 minutes
ago.)
If their operators are on here, or somebody knows them, please give them a
heads-up.
Kind regards,
Paul
PS: Of course, their software does not detect rejected messages/failed
deliveries, and their staff claims, it’s in the spam folder.
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk_______________________________________________
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