Chapter 16. Using MDA Programs with Postfix
Postfix can deliver messages destined for users on the local mail server using its own mail delivery method. In fact, it supports three different methods of delivering mail to local users:
sendmail-style mailbox files
Using a separate file located in the user's
Using Maildir-style mailbox directories in the user's
In addition to doing its own mail delivery, Postfix can use a fourth method of delivering mail: enlisting the support of an external MDA program. This chapter describes how MDA programs work and why you might want to use a separate MDA program when delivering messages to users on the local mail server. Following that, a popular MDA program, procmail, is described. ...