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
    $

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.
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