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| Developer(s) | GNU Project |
|---|---|
| Stable release | 4.3
/ 6 January 2024 |
| Repository | |
| Written in | C |
| Operating system | Unix-like operating system |
| Type | E-mail filtering software |
| License | GNU General Public License, version 3.0 or later |
| Website | https://www.gnu.org/software/anubis/ |
GNU Anubis is open-source software for processing outgoing email. It operates between the mail user agent (MUA) and mail transport agent (MTA), and can perform various processing and conversion in accord with the sender's specified rules, based on a configurable regular expressions system. It operates as a proxy server, independently from mail user agents.