Review for Export to ZIP by Tim Lamm
Rated 3 out of 5 stars
I tried this with Thunderbird 91.2 running in Windows 10. The add-on installed easily. I exported a folder with 162 messages, sorted chronologically. The add-on created a zip file containing each message as an eml file. The messages were sorted by sender then by date.
It would be nice to have more control over the output, such as sort order and choice of file format. But the add-on did what it said it would do.
To create your own collections, you must have a Mozilla Add-ons account.