Heho, I recently described how this could actually be used by a malicious third party to cause a sender to be blocklisted by major mail operators (see thread titled "DMARC/TLSRPT to non-existing accounts/reflection and sender reputation" from the end of April). However, in your case it does not really sound malicious.
Still, spamhaus might have picked up expired domains to setup spam traps, and you may be sending to a ruf/rua on an expired domain. (Note: Wild guess) In any case, I would be _really_ interested in hearing more in case you figure out the root-cause of this. With best regards, Tobias -----Original Message----- From: mailop <[email protected]> On Behalf Of Benoit Panizzon via mailop Sent: Tuesday, 17 May 2022 10:49 To: [email protected] Subject: [mailop] Spamhaus: Get more details about LISTING (Could a DMARC Report Address point to a spamtrap)? Hopefully somebody from spamhaus is reading. The 2nd day in a row, our main mailplattform IP address is listed and outlook.com blocks all emails. Spamhaus only gives a timestamp +/- 5 minutes. There are A LOT OF EMAILS passing our plattform in 10 Minutes. Yesterday I found a suspect. One customer had configured his exchange server to relay 'bounces' via our platform. That was fixed. Today I am looking through the logs again. No suspicious emails. But in that timespam, we send out DMARC reports. Could it be, that someone publishes a DMARC Report address which points to a Spamhaus Spamtrap? For the 2nd time I requestd 'more details' from Spamhaus. Is there a chance to get such informations? Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
