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What is the Developer Preview version?

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What is the Developer Preview version?

This article describes the Developer Preview version and provides instructions on how to switch from the Developer preview version to the public release.

Last updated on 18 Feb, 2026

What is the Developer Preview version?

Mailbutler has a special Developer Preview version that allows users to test our software before it is released. This is a working version of our plugin, and as such, is constantly undergoing changes. It is not a version that we guarantee will be stable.

If you are interested in installing the Developer Preview version, please contact support@mailbutler.io for the download link.

The Developer Preview version is right for you if:

  • you like to test out new software

  • you understand software can be broken

  • you don't mind getting regular (daily) updates

  • you accept that we can't offer you personal support when something is broken

  • you are committed to giving us regular and constructive feedback on any issues you find

How can I send feedback to Mailbutler?

Once you have installed the Developer Preview version, you can send us feedback through the feedback button located in your Mailbutler Sidebar:

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How do I switch from the Developer Preview version to the public release?

1. Uninstall Mailbutler following the instructions in this article.
2. Download the public release version from this link.

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