3 ms·

I've also been self-hosting email for years, and the only deliverability problem I've ever had has been with AT&T. If I try to send something to an AT&T custome

I've also been self-hosting email for years, and the only deliverability problem I've ever had has been with AT&T. If I try to send something to an AT&T customer, I get an automated "your message has been eaten" notice, and following its directions accomplishes precisely nothing. At this point, I can only guess they're hellbanning the IP block in which my VPS resides, because it does not show up on any public DNSBLs. Google? No problem. Comcast? No problem. Charter? No problem. AT&T? Problem.

DanAtC 4y ago
At least you get notified. Microsoft/Outlook on the other hand silently drops emails leaving you and the recipient in the dark.
- pas 4y ago
  that seems new, or maybe a different beast from the MS zoo of madness. gmail on the other hand does what others said, report smtp 250 and silently discard some emails. (mostly those that lack DKIM)
- raxxorraxor 4y ago
  The correct response would be to set them on the blacklist for a time. People would complain and they would quickly change their behavior. Microsoft currently really wants everyone to have a Microsoft account.