GNU Anubis

 [image of the Head of a GNU]

Table of Contents


  • 2024-01-06: GNU Anubis 4.3 released.

    Tarball name:

    • anubis-4.3.tar.gz
      MD5 checksum: bc80b9045b3c8f3b1d6798200cd81586
      SHA256 checksum: ff0af3337c462218e5ee244c7ef90188af9efdf095bc05b6333401cf9882af2c
      Detached GPG signature: anubis-4.3.tar.gz.sig
      MD5 checksum: 32dc9adf1d0daa54bff70f10b4e289b5
      SHA256 checksum: 098abec96097527be1857e4b8b5b5b4b7e58a8458f58ce2cb732f024df6e9ef5
      Detached GPG signature: anubis-4.3.tar.bz2.sig

    See the NEWS file for the list of user-visible changes.

  • 2014-05-23: GNU Anubis 4.2 released.

    Tarball name: anubis-4.2.tar.gz
    MD5 checksum: 3ca1dd378ba72900a432004cb9db935f
    Detached GPG signature: anubis-4.2.tar.gz.sig

    See the NEWS file for the list of user-visible changes.

  • 2008-12-20: GNU Anubis 4.1.1 released.

    Tarball name: anubis-4.1.1.tar.gz
    MD5 checksum: 28df4daee11bc74a9e4b19b425d8a196
    Detached GPG signature: anubis-4.1.1.tar.gz.sig

    See the NEWS file for the list of user-visible changes.

Introduction to GNU Anubis

GNU Anubis is an SMTP message submission daemon. It represents an intermediate layer between mail user agent (MUA) and mail transport agent (MTA), receiving messages from the MUA, applying to them a set of predefined changes and finally inserting modified messages into an MTA routing network. The set of changes applied to a message is configurable on a system-wide and per-user basis. The built-in configuration language used for defining sets of changes allows for considerable flexibility and is easily extensible.

Requirements/Supported Software

Highly recommended:

  • GSASL -- an implementation of the SASL framework.
  • A database. It can be one from the following: plain text, GDBM, MySQL, or PostgreSQL.
  • GnuTLS -- a Transport Layer Security Library.
  • GnuPG -- The GNU Privacy Guard with GPGME (GnuPG Made Easy).
  • Guile -- The GNU extension language.


  • The TCP/IP Identification Protocol server (any) -- required only by the `transparent' Anubis authentication mode.
  • PCRE -- Perl-Compatible Regular Expression Library.
  • PAM -- Pluggable Authentication Modules.
  • libwrap (TCP wrappers) -- an access control library.

Online Documentation

The GNU Anubis manual is available on-line. The source code for the manual is included in the distribution of GNU Anubis.

Support & Helping GNU Anubis

Please send any bug reports, improvements, comments, suggestions, or questions to bug-anubis at (public mailing list). Archives available.

Downloading GNU Anubis

Stable GNU Anubis releases can be found on [via HTTPS] and [via FTP]. It can also be found on one of our FTP mirrors.

Translations of this page

Please see the Translations README for information on coordinating and submitting translations of this article.