Here is my scenario:
I have 2 email accounts: admin@domain.com and bounce@domain.com.
I want to send email to all my users with admin@domain.com but then \"r
In the php mail command http://php.net/mail
you use the fifth parameter and add "-f" to it.
So, you use "-f mybouncebox@mydomain.com" as the parameter
the phpList newsletter manager uses this to manage bounces.
Once the bounces fill up in the mailbox, you can POP them, and process them. That's the easiest way to deal with them, as opposed to handling them when they arrive.