This morning after updating to the new Avast 4.5 I did a few test by sending myself a number of e-mails with Suspicious extensions, like .exe,.bat,.scr, etc. Avast deleted the attachments from the mail.
I also sent some e-mails with good attachments like .doc,.zip,.jpg,.gif,.wav, etc with one Suspicious extension .scr and all attachments were deleted. Known safe file attachments come through fine, except if there is one Suspicious extension attached with them.
The subject line has [avast! heuristic - WARNING] when this happens. What a nice feature!
I think this is new with the new 4.5 version but not totally sure because I don't remember testing this before. Anyway there is no doubt in my mind that Avast is the KING!
Thank you Avast
PS: and thanks for fixing the Skins too!
a61