Am Sa., 11. Jan. 2025 um 06:01 Uhr schrieb Michael Peddemors via mailop < [email protected]>:
> Your systems are being abused right now by a well known attacker.. > > Sending email replay attacks, and your systems also generate back scatter.. > > First of all.. (And this goes to all email operators) only allow domains > in the MAIL FROM, that are actually served by your servers. > > They actually use "proper" forwarding setups, but with fraudulent accounts. Unfortunately, they have gotten a bit more patient and let the accounts age longer. We have since re-tuned detection. Were there any issues after January 10th? Regards, Marc -- Marc Ballarin Senior Anti-Abuse Software Engineer Abuse Management IONOS SE | Hinterm Hauptbahnhof 1 | 76137 Karlsruhe | Deutschland E-Mail: [email protected] | Web: www.ionos.de Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 24498 Vorstand: Hüseyin Dogan, Arthur Mai, Dr. Markus Noga, Dr. Jens-Christian Reich, Britta Schmidt, Achim Weiß Aufsichtsratsvorsitzender: Sven Fritz
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