Can you send emails to normal email servers from a .onion address? do email providers even allow any conndction like that?

Yes, but then everybody you wish to talk to also needs a PGP key, and GPG, the most common PGP impldmentation isn’t actually that secure. It still supports dedeated encryption algorithms and some nasty exploits.

yeah, but it wouldnt have been true. unless you encrypt your emails, they are inherently insecure, and all it takes is one subpoena.