How do I add additional mail servers (and accounts).
Use like this for each account in your favorite mail client:
POP: localhost
User: your_username#pop.something.com
Pass: your_password
SMTP: localhost
User: your_username#smtp.something.com
Pass: your_password
This is the easiest way 
Hello, Im new to avast, and i have the same question, multiple email accounts, ie: yahoo, comcast, this is what i am putting in the INI file
[MailScanner]
DefaultPopServer=name@yahoo.com
DefaultSmtpServer=name@yahoo.com
DefaultPopServer=name@comcast.net
DefaultSmtpServer=name@comcast.net
The name is of course my email addy.
if this not correct can someone help me out here, hope to hear from someone soon.
I don’t know if you can have multiple default accounts in avast4.ini ???
You can’t set multiple ‘default’ email servers but… you don’t have to do it for avast! work with multiple email accounts (and different pop/smtp servers) ;D
Why don’t you simple run Mail Protection Wizard?
(don’t forget to close your email client).
More information about the avast4.ini file you can see here
Wellcome to forums!