No (or maybe yes, I'm not sure how exactly the question is meant). The connection from the mail client to avast! proxy must not be crypted (i.e. it's necessary to disable SSL in the mail client).
Later, avast! performs an encrypted communication with the e-mail server itself.
Doing the same for web browsers would be a problem (as the browser wouldn't see the remote certificates, wouldn't show you the "encryption" icon, etc.)
But yes, it's possible that avast! will implement a browser plugin for specific browser(s?) in the future which would be able to extract the already-decrypted data from the browser and scan them, before the browser really uses them. No promises though 
Oh yes, that would be great.Hope we can see this feature in "
avast! 7".
Many thanks for your reply igor, also for throughing light on this
Regards
Ashish
