Rated 5 out of 5 stars

by Peter Passchier on Sept. 11, 2023 · permalink

This extension is still the top of its game for many years already, and an important reason to stick with Thunderbird as a mail client. As I wrote many years ago, many powerful things are possible using MailMerge, but just being able to send personalized mails to a whole mailinglist is priceless.

A few days ago I wrote that this Add-on wasn't doing well, that it was very slow, popping up many different windows when it's run, and that, together with the changes that were forced by the redesign of Thunderbird caused me to be very pessimistic about the future usefulness of this platform. But it turned out that somehow I had ticked the box "Beta" in the settings. The author of this add-on personally reached out to me by email and pointed out that this might be the case. And indeed! Without that box checked, it ran like before, quickly filling my Local Folder's Outbox with generated mails.It took less than a minute to generate some 300 mails with attachments..!

Anyone wanting to do a bit (or a lot!) of automation in sending to a list of people, this is it, highly recommended!