Firewall like mail filter

Mopher is a mail filter application that implements Sendmails Milter API with the main purpose of filtering spam. Design goals are scalability combined with a lightweight and modular code base. The filter configuration format aims to feel like a firewall configuration.

Current set of features

  • Greylisting
  • Tarpitting
  • Database storage
  • Automatic whitelisting

Works great with

  • BerkeleyDB 1.85
  • ClamAV
  • DNS blacklists
  • GeoLite
  • P0f
  • PostgreSQL
  • Sender Policy Framework SPF
  • Spamassassin
  • SQLite3


Documantation and HTML versions of the mopher man pages can be found here. If you want to get mopher up and running as fast as possible begin by reading the Get started tutorial.


The latest development version is hosted at:


Please report any issues related to building, running or configuring mopher to the mopher mailing-list:!forum/mopher