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Z-Push

ActiveSync server for syncing mail, contacts, calendars

File Sync & Storage ★ 156 stars Hard setup AGPL-3.0

Z-Push is an open-source implementation of the ActiveSync protocol that lets mobile devices sync mail, contacts, calendars, and tasks from groupware backends. It is widely used to add push sync to self-hosted mail systems.

Official siteSource code

Key features

  • ActiveSync protocol
  • Mail and PIM sync
  • Push notifications
  • Multiple backends

Strengths

  • Released under the AGPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in PHP
  • Tiny footprint — runs in 256 MB RAM

Is Z-Push secure?

No known vulnerabilities affect Z-Push's latest release (2.7.6). OSV.dev lists 1 past advisory for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2025-8264, published 2025-07-29 (442 days ago), fixed in 2.7.6

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

Z-Push replaces

Self-hosted Exchange ActiveSync alternatives

Health badge

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

SelfHostIndex: 71 · good

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

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

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