Well, the scanner certainly won’t support SSL connections if they’re enabled in your e-mail client. SSL means “encrypting the communication such that nobody else can read it” - so, of course, even an antivirus cannot see it.

What would be possible (I guess?) is keep the communication between the e-mail client and avast! mail scanner in plantext (i.e. not encrypted, which shouldn’t be a problem because it’s just two programs on your computer speaking to each other) and let avast! communicate with your real mail server using SSL. That would mean incorporating SSL libraries into avast!.. we have already thought about it, but I don’t know anything else about the status. I think it’s not planned for any close future (but I may be wrong).