Multiple email sent boxes / signatures ?

[franks]

I have 4 mail accounts on my Verizon iPhone 4, with 4 inboxes. Is it possible to have 4 separate sent boxes? Can I assign a unique signature to each acct sent email?

 

[Demosthenes X]

There is a unique "sent" folder for each email account, but you can still only have one email signature. There might be a solution if you're open to jailbreaking, but I don't know off hand.