Release 8.51

Release 8.51

This release adds new ways to organize contacts, plan work across Mail, Calendar, and Tasks, and manage email signatures centrally, while also improving performance, security, and everyday usability throughout App Suite.

  • Managed email signatures and templates: Administrators can centrally provide predefined, read-only email signatures and templates. These appear in settings and compose with a clear predefined badge and can use placeholders that are filled with the user’s contact data.
  • Central design management for Signature Designer: Operators can now provide and control Signature Designer templates and design policies centrally, including visibility, ordering, defaults, labels, and custom fields.
  • Improved BIMI logo support: BIMI now supports local-part selectors, allowing different brand logos for specific sender addresses on the same domain.
  • More flexible scheduled sending: Scheduled send now offers additional quick options for afternoon and evening, alongside the existing morning options. Scheduled messages are queued within a short time window, helping distribute delivery more evenly.
  • Tasks in the calendar: Users can now show tasks with due dates directly in Calendar. The new Tasks calendar can be enabled in Calendar settings and shown or hidden like any other calendar.
  • More context for shared and delegated tasks: Task details now show who created a task when it was created by someone else, for example in shared task lists or delegated task workflows.
  • Choose where new contacts are saved: The contact creation dialog now includes a “Save in” picker, allowing users to choose the private, public, or shared address book where a new contact should be stored.
  • Private appointments by default: Users can now mark new appointments as private by default for their own calendars, making it easier to protect calendar details consistently.
  • Resizable all-day area in Calendar: In day and week views, desktop users can now resize the all-day section when many all-day appointments need more space.
  • Automatic replies for every received email: Users can now configure automatic email replies that are sent for each received message.
  • Client-side blocking of external mail content: Detection and blocking of external images and other external resources in email content now happens in the browser, alongside the existing client-side sanitization.
  • Ongoing date and time modernization: App Suite now includes Tempo, a new wrapper around JavaScript’s Temporal API, providing a consistent foundation for date and time handling across the UI.

A detailed list of changes can be found in the changelogs.

Technical documentation available at documentation.open-xchange.com/8.51.0

Released: July 2026