[throw101010]

Many websites now refuse to create an account for you if your email uses a more exotic domain, or especially the domains used by the many temporary email address providers unfortunately.

[jaywalk]

My email's domain is as exotic as it gets (I own it, and I'm the only one using it) and I've yet to encounter a website that rejects it.

Temporary email address providers though, yeah. I've seen plenty of rejects with those.