[CA0DA]

Won't lots of services just start blocking *@duck.com email addresses now?

[saimiam]

If that happens, check out https://PretzelBox.cc (FD - my product) and get *@your-domain.com.

They can’t block all domains other than gmail and outlook, can they?

[megapatch]

Then you don't use that service.

[blibble]

most likely

the only way the fastmail one works is there's paying customers on that domain (and a lot of them)