= Postfix/Mailbox_management =

There's a bajillion products out there for doing this, all with various levels of integration and do-it-all-ness. Some links.

 * Korreio - http://korreio.sourceforge.net/
 * http://python-cyrus.sourceforge.net/
 * Gross greylister - http://code.google.com/p/gross/
 * MailNG - http://projects.koalabs.org/trac/mailng/
 * pfxpold "extensible policy daemon" - http://sourceforge.net/projects/pfxpold/