MailMerge365 - Mail Merge for Office 365, Mass personalized Email with high response rates

MailMerge365

Welcome!

MailMerge365 is an add-in for Microsoft 365 and Outlook. In order to use it please login with your Microsoft 365 account using the button below.

If you have not signed-up yet an account will be automatically created and linked to the account you're logging in with.

Recent changes

• Improvements to attachment handling 2025 - Update Nr. 3

MailMerge365 now supports niche file types better when sending them as attachments.

• API Access to Unsubscriber Lists 2025 - Update Nr. 2

To facilitate an automated processing of unsubcsriber lists in third party systems, you can now enable API Access to your unsubscriber list which with a unique URL that will provide a list of the email addresses currently on your unsubscriber list.

• Modernization of Authentication 2025 - Update Nr. 1

In alignment with Microsoft’s Secure Future Initiative (SFI) MailMerge365 no longer uses older authentication methods (which will be deprecated in 2025) and has switched the plugin to use Entra ID Authentication already used by the backend. No changes are necessary on behalf of MailMerge365 users or their administrators.

See full change log...

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