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

• More reliable personalization tokens 2026 - Update Nr. 3

Fixed an issue where a personalization token (such as {{First Name}}) was left unresolved if your mail client wrapped it across a line break or split it with hidden formatting while you were editing. MailMerge365 now repairs these tokens automatically before sending, as long as they match one of your spreadsheet columns.

• Dark Mode and Sign-In Improvements 2026 - Update Nr. 2

MailMerge365 now supports dark mode. Use the new toggle at the bottom right of the plugin to switch between system default, light and dark mode - your choice is remembered on this device. Read more

• Fix for tracking links on fragment URLs 2026 - Update Nr. 1

Fixed an issue where URLs that only differ in their fragment (the # portion of the URL) were incorrectly treated as the same link, resulting in identical tracking links. This affected sites that use client-side routing such as single-page applications.

See full change log...

Go to help page