Hi, Am Sa den 24. Jan 2026 um 11:41 schrieb Jaroslaw Rafa via mailop: > Dnia 24.01.2026 o godz. 10:35:06 Klaus Ethgen via mailop pisze: > > Is there any way to reliable forward their mails without many gets > > rejected? > > Just exempt Microsft servers from SPF checking. I don't know what mail > server software are you using on your server, but for example with Postfix > you can configure all the checks and verifications any way you want at any > stage of SMTP transaction. So it should be quite simple to exempt Microsoft > servers from SPF checking only while not completely "whitelisting" them (I > understand by "whitelisting" you mean exempt from any checking and > unconditionally accept the message).
Well, that would help, maybe unless they think of some other annoying way to obscure. The only problem is, that their hostnames are somewhat random and unguessable. By the way, exim, as it is the only one with that flexibility. > BTW, SPF is not and never was meant as an anti-spam measure, and has > virtually nothing in common with spam checking. The most notorious and > active spammers have usually SPF, DKIM and DMARC configured perfectly fine. I know, I know. However, it still prevents some random bots from delivering there crap. Regards Klaus -- Klaus Ethgen http://www.ethgen.ch/ pub 4096R/4E20AF1C 2011-05-16 Klaus Ethgen <[email protected]> Fingerprint: 85D4 CA42 952C 949B 1753 62B3 79D0 B06F 4E20 AF1C
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