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The original was posted on /r/selfhosted by /u/D4NKJ35U5 on 2025-06-26 15:49:57+00:00.
Setting up my mail server because why not, I'm a nerd and I want to. First day is okay, I'm just testing inbound to the server because I don't want to trip any flags, I know Microsoft is sensitive. Next day, I've made sure my spf, DMARC, dkim, tlsa are all in alignment. Dig + openssl to verify certs and records from my other servers, + external services to verify.
Everything checks out, start sending from the server to my own email addresses. They land in spam, as is expected for new senders, but they make it through. Keep in mind this isn't dozens of emails either - 1 email per domain outbound to 1 of my addresses each at Outlook, Google, Yahoo. At this point inbound and outbound to all 3 works.
A day or two, I've changed nothing, and now Outlook won't send to me. I can still send to Outlook, but they reject outbound towards me. Another day passes, and now outlook won't talk to my server at all, no inbound or outbound, I've been s3150'd ๐.
The IP is clean, I double and triple checked before begining because I've been down this road before. The domains are clean, they've always been managed by me, and never been used to spam. I wasn't mass-sending either, (although I was using swaks in a script so maybe that?).
Anyway, I'm not asking for help - I know what I need to do, I'm just mostly ranting. If you've read this far; ๐ช.
Editing to add: I forgot to mention how they're mocking me! They won't accept my mail, or deliver my mail, but they'll still send me the DMARC reports! Ugh! ๐ซ