It’s a small advance, but one that speaks to Meta’s enginerring team paying attention to how the fediverse community is trying to educate Threads users about the possibilities.
The fediverse is now something that you can evangelize about. Its turning into a buzzword …
none of the major providers will deliver your email without your mail server having first built a reputation
There are definitely major, and easily-abusable “features” being implemented by the major email providers, but I don’t think your statement is correct. I have a Hetzner server, and I can receive email from it (to Gmail) just fine, as long as I have SPF, DMARC, and DKIM set up. I can also create a new server with a new IP and not have any issues. The issues may arise with shared IPs/ranges that are also being used by spammers. Otherwise, if you’re planning to send bulk email you just need to warm up the IP.
There are definitely major, and easily-abusable “features” being implemented by the major email providers, but I don’t think your statement is correct. I have a Hetzner server, and I can receive email from it (to Gmail) just fine, as long as I have SPF, DMARC, and DKIM set up. I can also create a new server with a new IP and not have any issues. The issues may arise with shared IPs/ranges that are also being used by spammers. Otherwise, if you’re planning to send bulk email you just need to warm up the IP.