Yeah I got that too. I deleted it cuz I didnt send anything...

Oh that is just wonderful. Yeah, I usually just delete those things. Hopefully, I will not forget and open one!

Yeah when those postmaster things happen, its because the virus has gotten in and has emailed itself to many people from your computer. When it emails itself to an invalid email address, the computer that received the invalid email things you did it on purpose, so it sends you a failure notice. It doesn't necessarily mean that your computer is infected, but it does mean that you received a virus and that virus successfully used your computer to replicate itself.

I dont think so though, cuz the delivery failure postmaster normally says "daemon" something or other, but this one is different it could be I dont know though.

I thought that's what you were talking about. They say "mailer-daemon?" I guess the one you got must have been a virus spoofing a mailer-daemon email, but its very easy to make it look _exactly_ the same, which makes me think maybe this was a different mail server, and a legitimate failure notice.

Nope... Yahoo has always said mailer daemon for me... But now its like postmaster delivery its like a bootleg postmaster

I sometimes get postmaster ones ( I think it depends partly on the receiving server) and so far the attachment had always been my own outbound message that couldn't be delivered. Other than a few at the time of a really big virus going around when I was moving and hadn't been online for like 2.5-3months. But they were really obvious stuff.

Yeah they won't all be the same. Its not yahoo that is sending them, its the mail server for the email address that wasn't valid.