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Wow, it's really happening! Thanks Microsoft. Your move now, Google. 😈

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Microsoft is rolling out outbound SMTP #DANE in Microsoft 365 Exchange Online and we seen them querying for TLSA records already m365admin.handsontek.net/upcoming-relea stats.sidnlabs.nl/en/mail.html#t

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>Thanks Microsoft On Rich's account? Wow, Hell must've _really_ frozen over :o...

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Normalizing the mechanism to let mail recipient sites make MITM impossible is huge. Europe is on board but US has been nasty holdout with Google refusing to support the standard & others not taking action. MS doing it is game-changing.

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Now if only Microsoft would let me SEND email to their domains and take me off their GD blacklist. I have DKIM set up properly, what more do you want?!

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You should also make sure you have a DMARC p=reject policy or mail without a valid DKIM signature aligned with the FROM address won't actually be rejected. It's likely that none of that is related to why you're blacklisted by them though. They have multiple different blacklists.

10:11 AM · Jan 7, 2022Twitter Web App

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You can make an account at dersupport.olc.protection.outlook.com/snds/ to check the Outlook SNDS IP blacklist status. It's only for IPv4 since they still don't support IPv6 likely for spam filtering reasons. It's only used for their traditional mail services and Outlook 365 uses a separate approach.

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Their IP blacklist is permanent and never expires. It doesn't matter if the last time the IP sent any spam or even mail of any kind was 15 years ago. We tried to use their appeal process for the GrapheneOS mail server multiple times and rarely even got the automated response.

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