New release v4.21.0

New features for the Outlook add-in

2025-08-15

🔗New features for the Outlook add-in

New launch events and custom code support:

  • React to launch events OnMessageRecipientsChanged and OnAppointmentAttendeesChanged.
  • Allow adding custom code to the add-in so you can directly influence which signature it will set.
    For example, you can set a specific signature…
    • …when there are only internal recipients, or another signature when there are external recipients
    • …depending on the from email address
    • …when a specific customer is in the To field
    • …when the current item is a mail or an appointment
    • …when the current item is a new mail, or another signature when it is a reply or a forward
    • …depending on the subject
    • …or any other condition derived from the information available in the customRulesProperties object

See .\sample code\CustomRulesCode.js in the Outlook add-in folder for details.

For a comprehensive list of all changes, dependencies, and fixes, please consult the official CHANGELOG.

🔗Interested in learning more or seeing our solution in action?

Contact us or explore further on our website. We look forward to getting to know you!

new release

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That works well as long as...

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A communication channel that already exists but is rarely managed

Every organization sends emails. And every email includes a signature.

Sales conversations, support replies, project updates, quotations, follow‑ups — all of them leave your organization with a visual and textual impression attached. Yet in many companies, email signatures are still...

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🔗 Why build new infrastructure just to manage signatures?

Set-OutlookSignatures runs on your existing systems, does not bring new dependencies and does not transfer any data externally.

Many solutions require new servers, connectors, or email rerouting. Set-OutlookSignatures doesn’t:

Runs on your existing systems No new dependencies No external data transfers Simple, secure, and scalable, without the overhead.

This is made possible by architecture developed from practical experience for practical use, with a focus on work simplification and...