[ricg]

Which mail providers support this? I'd like to set up something like this. Thanks!

[strboul]

StartMail supports a form of this called as "aliases" with the StartMail domain.

https://www.startmail.com/

(Disclosure: I work at StartMail.)

[paledot]

I do this with ProtonMail. I have it set on a subdomain, though: my regular email is [e-mail], while my account email is [e-mail]. This avoids the spam sent to asdf@everydomain.

[lloeki]

Fastmail, can't recall if assuming you want to achieve something like name+tag@domain it would be [e-mail] or [e-mail] (IIRC the latter)

[JimDabell]

You can do this with Fastmail by going to Settings => Domains => Edit => Routing.

[ricg]

Thanks a lot! I'll give it a try.