Hi, I have been in contact with them last weeks regards to some S3150 blocks and they seemed to have changed some things.
- Filing form (1 or 2 IP addresses only) - Autoreply saying Not qualified for mitigation. - Reply to have it delisted. - Actual response from a human In that last case they used to say the block has been lifted yadayada but now they came back to me in all cases saying the throttling limitation has been set to a more appropriate level based on the reputation. So maybe try and submit 1 or 2 IPs (I used 2 max) and see what they do. I also got some reply with best practices and such. Overall it is just a pain to get some answers from MS. They won't share detailed information about the listings. Hell, in some cases they just kept ignoring my responses. Greetings, Patrick van de Kuil Anti-Abuse & Email Deliverability Open-Xchange > On 08/11/2026 2:57 PM CEST Benoit Panizzon via mailop <[email protected]> > wrote: > > > Hi > > One of our IP addresses once more got hit by the ominous S3150 about 4 > days ago and still going. > > * Filling Form > * Replying to automatic first reply, confirming we follow best > practices recommended by Microsoft, asking for human review. > > The third time now I got a human reply asking me to just re-submit the > ip or ip range via form to create a new case. > > Each time I asked if this indeed helps as I would more consider this > contra productive if I bother multiple Microsoft employees with > multiple cases about the SAME issue. - but I get not reply to this > question. > > So I start wondering if this works differently and if the S3150 ban is > only being lifted when a certain number of cases regarding the SAME > issue have been opened. No problem I could open a case for the same > issue all hours until I don't see S3150 in our logs anymore ;-) > > Anyone an insight how this best works? > > What is best - submit only the one IP address affected (used for a > specific domain) or submit our whole ISP outbound email ip range for > all our customers domains each mapped to it's dedicated outbound ip? > > 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
