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What happens to existing Horde Webmail instances after its removal from Plesk in April 2025?

Dobrin Ivanov
Updated
kb: how-to Plesk for Linux Horde

Applicable to:

  • Plesk for Linux
  • Plesk for Windows

Question

  • What happens to existing Horde instances, and do users need to manually switch to another webmail client like Roundcube to maintain webmail access?

Answer

As of April 2025 (Plesk Obsidian version 18.0.69), Horde webmail is no longer installable or supported in Plesk, still, existing Horde installations are not automatically uninstalled and may still function, though their reliability is not guaranteed.

Users with existing Horde instances can continue using them at their own risk and no automatic migration to another webmail client (e.g., Roundcube) will occur.

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    Damien Ransome

    It would be more helpful to outline steps required to safely transition servers off Horde onto Roundcube. 

    For example outlining considerations such as data that might be stored within Horde (contacts, calendar events etc.); how to identify if any exist and avoid accidentally losing them, and the corresponding CLI commands to bulk switch all sites currently using Horde to Roundcube.

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