Version 4.5 Beta has a new mail detection that will work automatically. Please, set up your email account just as avast does not exists. It will detect the pop3/smpt/imap ports and scan your messages. I just said that if you can not send smtp authenticated emails the problem won’t be avast. Of course, avast 4.5 will change the settings automatically (from 4.1) but, if you have configurated your settings manually, you’ll have to done them again manually.

Do I make myself clear? :-[