OpenEMM + Normal (everyday) Mail Server

[CENTS]

Would it be possible to install OpenEMM as well as normal, everyday email server functionality (something like Postfix + Dovecot + Amavisd)?

How does OpenEMM track its bounces? I'm wondering if I could let Postfix listen on the normal ports mailservers listen to, and then if its a bounce for OpenEMM, I could process the email / forward it to the OpenEMM mailer processes.

Am I crazy, or can this be done?