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imapfilter

Scriptable IMAP mail filtering utility

Mail Servers ★ 937 stars Medium setup MIT

imapfilter is a mail filtering utility that processes mailboxes directly over IMAP based on rules written in Lua. It runs as a client-side tool and can sort, move, and act on messages.

Official siteSource code

Key features

  • Lua-scripted filtering
  • Works over IMAP
  • Client-side processing
  • Very lightweight

Strengths

  • Released under the MIT license
  • Written in C
  • Tiny footprint — runs in 32 MB RAM

Is imapfilter secure?

OSV.dev lists 1 published advisory for imapfilter. It doesn't publish GitHub releases we can match, so we can't say which of them apply to the current version. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2016-10937, published 2019-09-08 (2593 days ago)

Source: OSV.dev, checked 2026-10-14. How this is measured.

imapfilter replaces

Self-hosted Gmail filters alternatives

Health badge

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SelfHostIndex: 55 · fair

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