Ok The chain was this:
Eudora 127.0.0.1:9999 -> K9 -> POP3 server
This chain worked under 4.1 with no problems.
Email prgram will connect to K9
Then K9 connected to the POP3 server on 110...
I sume avast was scanning the email when K( accessed the remote POP3 server. And yes, it would from time to time mark some message with viruss.
This was working before i updated and even when i do a uninstall of avast it is still not working.
From your reply, my setting on the XP should be working, Cause I modified it to talk to K9.
I can bypass the connection to K9 and loose all my anti-spam functions..
The problem as i see it.. after install avast or XP or ME machine i lost the capcity for my email programs to access the localhost at any port configuration.