Might I ask for some more detailed info: Does it work without K9? Does it work in K9 directly? Does it work in some other mail client on your PC? What are your account settings (username, server, port)? What port does K9 listen on (default 9999) ? What port does ashMaiSv.exe listen on (default 110)?

Also, you might have a look at this thread, it’s concerning “problems” with k9 as well. http://forum.avast.com/index.php?board=11;action=display;threadid=8099;start=msg65888#msg65888

Bye.
Lukas