Sieve

Sieve is a programming language that can be used for email filtering [1]. It is available in Dovecot Mail-Delivery Agent for instance.

Guides

• Postfix Dovecot Sieve – Automatically move spam emails into trash folders.

In this guide, we use Postfix as MTA and Dovecot as MDA (instead of procmail).

• How to install and setup a powerful mail server on Linux
• Goodbye procmail, Hello Sieve

Install in Postfix

Postfix does not support Sieve, but instead may delegate local mail delivery to another agent. See Postfix for more information.