I can send and recieve mail trhu the last account but only if I use the domain name in the POP3 server and the domain name in the SMTP setting .
Are you saying that if you use the normal pop3 and smtp servers it will work?
I mean, only with avast scanning it won't work?
If so, you can test for sending:
username@smtpserver#smtpserver
into the smtp authentication
For receiving it should work:
servername#username
Do you have any spam killer?