I got a bogus email from a friend saying it was from his iphone, he did not send it...was my iphone or the email compromised?
Most likely it is your friend's email or iPhone that has been compromised. It could be someone has hacked his account or there is a virus sending random emails. To be on the safe side, scan your computer or your iPhone to detect any present virus.
I'll vote on that virus thing....
You friend has a virus on his phone