On 2026-02-09 at 16:05 +1300, Alexander Neilson wrote: > Potentially regularly check the SPF record Microsoft publishes and > resolve all the steps and use that list to trigger your rejection? > > That should catch any of the domains including people who move to > M365 hosting for their services.
M365 mail system is different than the freemail one (outlook.com, hotmail, etc) Being blocked by one does not mean you are blocked in the other (even though whatever caused a block in one is likely to affect the other as well, but they are different blocks and you need to handle them separately) Moreover, M365 customers could have custom rules for their email so their email would not be blocking you (or to explicitly drop you). Not to mention their reception path might be separate and allow your emails to get through. Regards _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
