Let me sniff around via the DENOG community, Thomas.
Best,
-C.
On 22.01.2026 16:22, Thomas Scott via mailop wrote:
Dear all,
I'm looking for a contact of AS48823 hosting.de. Mails sent towards them
bounce due to
554 5.7.1 Your message contains a domain on our domain block list. See
https://postmaster.routing.net
The given link isn't helpful, unfortunately. Mails sent to postmaster@
bounce as well.
Thanks in advance,
kind regards,
Thomas Scott
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