system
4
keywester
I am receiving no slowing down of mails with Thunderbird 1.0 and avast 4.5.549, maybe try updating to the latest version of Thunderbird will help.
Also maybe making sure your not using secure authentication or SSL/TSL encryption, this will speed the scans up (i don’t think avast supports them).
But if in the end you want to disable mail scanning open up the avast providers screen click Internet mail then press ‘terminate’ (see below).
–lee