SHSelfHostIndex
IM

imapsync

Synchronization and migration tool between IMAP accounts

Mail Servers ★ 4.2k stars Medium setup GPL-3.0

imapsync is an open-source tool that synchronizes mail between IMAP servers and accounts, useful for migrations and backups. It performs incremental, fast transfers of folders and messages.

Official siteSource code

Key features

  • IMAP to IMAP migration
  • Incremental synchronization
  • Account backup
  • Highly configurable

Strengths

  • Released under the GPL-3.0 license
  • Active community (4.2k GitHub stars)
  • Written in Shell
  • Tiny footprint — runs in 64 MB RAM

Is imapsync secure?

OSV.dev lists 1 published advisory for imapsync. 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-2023-34204, published 2023-05-30 (1233 days ago), fixed in 2.229

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

imapsync replaces

Self-hosted IMAP migration services alternatives

Health badge

Maintain imapsync? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 86 · excellent

Markdown
[![SelfHostIndex health score for imapsync](https://selfhostindex.com/badge/imapsync.svg)](https://selfhostindex.com/app/imapsync/)
HTML
<a href="https://selfhostindex.com/app/imapsync/"><img src="https://selfhostindex.com/badge/imapsync.svg" alt="SelfHostIndex health score for imapsync"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/imapsync.svg
   :alt: SelfHostIndex health score for imapsync
   :target: https://selfhostindex.com/app/imapsync/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

Similar mail servers apps