With each of my folders of about 40,000 emails, I had to wait roughly 30 seconds for the dialog box to appear. Move the dupes to a chosen folder (e.g.This did an excellet job of correctly collating the two to five copies of each email.
Remove duplicate messages in thunderbird plus#
What worked for me was ticking Message ID plus a few others, but unticking Size, Lines, CC and Body. I ran some tests with a small collection of dupes until I had these right. Set its prefs for email matching criteria (in Thunderbird » Prefs » Manage Add-Ons) according to what works for you. After I did this, I did wait a long time for the Spotlight indexing in Thunderbird to finish - not sure whether this was necessary, but I suspect it probably was. I think my use of Path Finder (instead of Finder) helped a bit here. Follow these instructions to import your newly-created mbox file quickly and easily into Thunderbird.(The mailboxes that Mail keeps in the Mail folder inside your user's Library, with their extension.
Remove duplicate messages in thunderbird archive#
![remove duplicate messages in thunderbird remove duplicate messages in thunderbird](https://www.easytechtools.com/wp-content/uploads/2021/07/image4-1.png)
My mail.app emails got rather out of hand I won't bore you with how. I spent a lot of time searching this question, and this is the only solution I found that worked.
![remove duplicate messages in thunderbird remove duplicate messages in thunderbird](https://addons.thunderbird.net/user-media/addon_icons/4/4654-64.png)
This workaround, using Thunderbird, allowed me to successfully remove 30,000 duplicate emails (from a collection of about 80,000 emails) in OS X's Mail.app.