On: Lies we tell ourselves about email addresses

[trumpdong]

I think the only way to deal with that right now is to hire a company whose job is to deal with it. They'll random-check your outgoing emails are indeed what you say they are, and they maintain a reputation with the big providers for checking it properly.

What pre-validation could you do that would possibly be useful?

[jiveturkey → trumpdong]

entropy check, for one