[ddevault]

Copying my reply to HN:

Some feedback: you should add a PTR record (reverse DNS) for studer.dev and mail.studer.dev.

I also noted that your DMARC record has p=quarantine, which depending on the details of your outgoing setup, may cause your emails to be placed in the spam folder if DMARC fails for any reason. I generally advise against using DMARC with any policy other than `v=DMARC1; p=none` or else you're liable to run into issues, it's not a very good standard.

Otherwise, your configuration looks good to me. Also try https://www.mail-tester.com to see what they think.

[alex_studer]

In case anyone is curious: I checked and the PTR record for my mail server (168.62.161.121 -> mail.studer.dev) is valid. mail-tester.com also gives me a 9.9/10, but I just tried sending an email to a Gmail account and it went straight to spam :(

I suspect it's probably a volume thing? As in I'm not sending enough email for Gmail to make any judgements about my mail server, since I'm only an individual. Of course there's not really a great way to resolve that...

[smartbit]

For gmail, try adding an IPv6 address with proper reverse resolving. Tip from HN some time ago.