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# Release Notes

Cyrus has switched to an odd-even release cycle.

With our versioning system using `major.minor.micro` numbering, the minor 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 3.0.9. Documentation at https://www.cyrusimap.org/3.0/.

## Development Version

Latest development snapshot is 3.1.6. Documentation at https://www.cyrusimap.org/dev/.

Warning

These 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 3.0

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

### Series 2.4

- Cyrus IMAP 2.4 Releases
- Cyrus IMAP 2.4-caldav Releases

## Older Versions

### Series 1

- Cyrus IMAP 1.x Release Notes

### Series 2: 2.0 - 2.3

- 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