Do that and you will see the X-header of avast…
You’ll see that avast has already scanned that messages ;D

No, it’s not safe.
Safe is ‘Virus Chest’ on avast (an avast special folder that contains the infected files. The files are passworded by avast and nothing could ‘open’ or ‘run’ the files. There they’re safe). Recycle bin of spami is not for that. The emails need to be scanned before they reach the recycle…

Strange. I don’t use yahoo but avast can’t scan (in actual version) emails that are not pop3/smtp ones. Take care and search the board for yahoo. You will find other suggestions to handle this kind of messages.

Well, I’m leaving on vacation 8)