You could try some of the options listed here for troubleshooting: https://learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/email-delivery-issues
Best, Attila On Thu, Nov 2, 2023 at 4:37 PM Mat Kowalski via swinog - swinog at lists.swinog.ch <[email protected]> wrote: > And I realized it's silly to hide domains, so here it goes > > * sender domain - kowalski.xyz > * recipient domain where the problem was first observed - amag.ch > * my 2nd domain which reproduces the problem - microsoft365.kowalski.xyz > > Cheers! > > On 02/11/2023 16:17, Mat Kowalski wrote: > > Hi all, > > > > I wonder if someone could point me in a correct direction for debugging > mails between Proton and Outlook landing in spam... What happens is > > > > * my domain XXX plugged to mail.protonmail.ch. > > * my 2nd domain YYY plugged to mail.protection.outlook.com. > > * every mail sent from Proton to Outlook lands in spam > > * headers as seen by Outlook indicate SCL score 5 > > > > The content I use for the test is not anything synthetic but a real > message. In the headers I can also see that the "basic configuration" is > correct, i.e. > > > > * SPF passed > > * DKIM passed > > * DMARC passed > > > > so this gives no useful information sadly. Maybe someone here has > experience with debugging Microsoft? The issue is that this makes my > private mailbox unusable as whoever out there uses Outlook as their mail > service is not getting my emails. Quite sick... > > > > Thanks a lot for any help, > > Mateusz > > _______________________________________________ > swinog mailing list -- [email protected] > To unsubscribe send an email to [email protected] > >
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