Elaborate? I'll eventually get around to building an email thing but nostr based, though are we talking purely nostr (npub to npub)? in which case it's easy, or are you talking about having a bridge (ftc@nostrdev.com receives an email from freak@proton.me , then that email gets converted to a nostr event/dm sent by the npub of ftc@nostrdev.com (nip-05 from .well-known) to itself with reference of the sender email (being freak@proton.me)? then things got a whole lot complex x3
So ya, expand on the specifics of the request if possible.