Hi,
Avast mistakes traffic from Deluge torrent client as secure IMAP trafic and presents a pop-up warning telling it can’t scan that information. I guess it happens because someone somewhere has his torrent client port set to IMAP port. This Avast behaviour is confusing since Deluge is not email client and causes unnecessary pop-ups.
http://forum.deluge-torrent.org/viewtopic.php?f=7&t=34931