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# Cyrus IMAP

# Release Notes

Cyrus uses an odd-even release cycle.

With our versioning system using `major.minor.micro` numbering, the minor (middle) number reveals whether a version is stable (even), or development-only (odd).

A 3.0.1 release is stable, but a 3.1.4 release is developmental only.

## Stable Version

Latest stable version is 3.4.4. Documentation at https://www.cyrusimap.org/.

## Development Version

Latest development snapshot is 3.7.0-alpha0. Documentation at https://www.cyrusimap.org/dev/.

Warning

Development versions are tagged snapshots of the master branch, and should be considered for testing purposes and bleeding-edge features only. We will try to tag these snapshots at coherent development points, but there will generally be large breaking changes occurring between releases in this series.

## Supported Product Series

### Series 3.4

Documentation at https://www.cyrusimap.org/3.4/.

- Cyrus IMAP 3.4 Releases

### Series 3.2

Documentation at https://www.cyrusimap.org/3.2/.

- Cyrus IMAP 3.2 Releases

### Series 3.0

Documentation at https://www.cyrusimap.org/3.0/.

- Cyrus IMAP 3.0 Releases

### Series 2.5

Documentation at https://www.cyrusimap.org/2.5/.

- Cyrus IMAP 2.5 Releases

## Development snapshots

- Cyrus IMAP 3.5 Tags
- Cyrus IMAP 3.3 Tags
- Cyrus IMAP 3.1 Tags

## Older Versions

### Series 1

- Cyrus IMAP 1.x Release Notes

### Series 2: 2.0 - 2.4

- Cyrus IMAP 2.0.x Release Notes
- Cyrus IMAP 2.1.x Release Notes
- Cyrus IMAP 2.2.x Release Notes
- Cyrus IMAP 2.3 Releases
- Cyrus IMAP 2.4 Releases
- Cyrus IMAP 2.4-caldav Releases