I downloaded "The Bat!" for you !
See the attached image.
Mail account and server name in the image are not real. Those are sample data.
With manual settings ( correct server and account ), I made sure with that avast! checked downloaded e-mail. ( Set PopServer1=127.0.0.1 in the Avast4.ini )
Select "Account" -> "Properties" -> "Transport" and you can see pop3 setting on "The Bat!".
[MailScanner]
PopServer1=pop.gmx.net
PopServer2=operamail.com
Popserver3=pop3.myrealbox.com
SMTPServer1=mail.gmx.net
SMTPServer2=operamail.com
SMTPServer3=SMTP.myrealbox.com
You should specify only one server as default.
Thanks