This is shortly from that page:
- Left click on your avast! blue ball icon in system tray (next to system clock). That will bring up avast! On-Access Scanner.
- At the bottom of the Window that just popped up on your screen, choose DETAILS...>> (if it's not enabled by default). That will allow you to see little panel on the left hand side of that window, with all those Provider icons.
- Now, click on INTERNET MAIL provider icon, and click on CUSTOMIZE.
a) under POP tab, put checkmarks on both boxes,
b) under SMTP put chekmarks on first and third one,
c) under IMAP tab check both,
d) under ADVANCED put checkmark on SHOW DETAILED INFO
ON PERFORMED ACTION. Also, under same tab, set TIMEOUT FOR
INTERNET COMMUNICATION (S) to, let's say 300.
e) Next tab is HEURISTIC. Set it to MEDIUM and click OK.
Pay attention to RED marked lines...