[confident_inept]

I have a short tuta.io address that always gets odd looks when I spell it out to people, who tend to react weirdly when not hearing a major domain when typing in an email address.

Anecdote aside, I've had several people not receive my emails at all, some I've been able to actually test, using Tutanota for outbound messages. I've created or helped create Teams accounts for others several times in the past and have never run into anything like this with any other provider. Microsoft is setting a precedent by singling out one provider. I hope it's not a sign of things to come. Virtually all email is de-facto controlled by a Microsoft/Google duopoly.

I looked into running a personal email server on a home machine once and was put off by how many people told me my messages would be undelivered without numerous hoops to jump through.

What a mess.

[arkadiyt]

I use protonmail with a personal domain name and I've had all sorts of reactions. Credit card companies calling me because they think I'm committing fraud, retail sites cancelling my orders because they think I'm scamming them, etc.

[LeoPanthera]

This is hard to believe. I've used a personal domain email for probably over 20 years and this has never happened to me, even once.

[Semaphor]

You must use either a very weird domain, or a very weird first part for the address. It’s not as if custom domains are that rare.