It appears that Dan Mahoney via mailop <[email protected]> said: >Hey guys, this looks like a fun one. > >I have a user, Jack Zito. He owns jackzito.com, for whom i host a vanity >domain. Jack wants to forward his mail to hotmail, >and hotmail has removed the ability to check external accounts (google's also >removing this option). > >There's a fashion brand, Vitaly, that's sending jack email. It comes with a >VERPified sender. I forward it on, not modifying >either the body or the MAIL FROM so I don't break DKIM signatures. According >to microsoft, it passes DKIM and DMARC (not >SPF). They still bounce it.
Yeah, they have a new rule that both SPF and DKIM have to pass. It might work if you change the envelope address to one you control so the SPF is OK, or it might not. R's John >---- Transcript of session follows ----- >... while talking to hotmail-com.olc.protection.outlook.com.: >>>> DATA ><<< 550 5.7.515 Access denied, sending domain VITALYDESIGN.COM doesn't meet >the required authentication level. The sender's >domain in the 5322.From address doesn't meet the authentication requirements >defined for the sender. To learn how to fix this >see: https://go.microsoft.com/fwlink/p/?linkid=2319303 Spf= Fail , Dkim= Pass >, DMARC= Pass >[BY5PR19MB4066.namprd19.prod.outlook.com 2026-05-22T20:45:20.818Z >08DEB7A2AF3393C5] >[SJ0PR13CA0172.namprd13.prod.outlook.com2026-05-22T20:45:20.824Z >08DEB71A0186A5A0] [CO1PEPF00012E62.namprd05.prod.outlook.com >2026-05-22T20:45:20.839Z 08DEB6EE93094541] >554 5.0.0 Service unavailable > >=== > >And the VERPified sender, also bounces, so they won't stop sending this stuff: > >.. while talking to mx.sendgrid.net.: >>>> DATA ><<< 550 Mailbox not found >550 5.1.1 ><bounces+1998576-78a8-vitaly=jackzito....@u161779.wl030.sendgrid.net>... User >unknown Oh, sendgrid. Well, never mind. _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
