[mkasu]

Despite having some domains which I mostly use for gaming purposes and stuff, my main "serious" email address is @fastmail.fm. It is a nightmare to tell it to someone by phone. It goes as far as "dot fm, never heard that, do you mean .com?" Wtf, that doesn't even sound similar. Emails never arrive.

[tga]

Luckily for you, Fastmail eventually got their .com, so I believe @fastmail.com should also work now (not a customer so I don't know for sure).