A long time back I entertained the idea of buying hc.im and using the email address [email protected]. (my name is michael) Perhaps making business cards with a laser cutout so I could turn the card over if it wasn't apparent. But two-letter im domains are a very expensive ongoing cost so it didn't seem worth it for the gimmick.

I have a very short email address (in the form [email protected]) and I haven't found anywhere that doesn't accept it - except for humans, who often refuse to believe it is real and will insist on a longer one.

(I have a backup longer one.)

I have a similar one and it has been rejected many times. I still write to the company but nobody gives a shit. I also tried on twitter.

Surprisingly people are fine with it, I think that this is thanks to social media handlers such as @wazoo - people group all these together as "email and such"

I suppose it should be possible to get an MX record to work with a root domain, but that person that has it would have to probably work for or be the owner.

MX records fallback to A records, so ~10ish TLDs work this way already.

sun@. would likely blow up even the best email checking regexes.

creative!