Rated 5 out of 5 stars

Besides lightning and enigmail, Mail Merge is essential to me. It makes adressing multiple recipients (whilst respecting their privacy) so easy, since it doesn't rely only on csv lists any more -- just type multiple adresses in the thunderbird's mail-editor and MM asks what to to. GREAT JOB!

My (small and private funded) mail-provider does not allow more than 10 smtp/submission connections per minute. Any chance MM will support some kind of delay ("limit to sending N mails a minute") in the future?

This review is for a previous version of the add-on (4.3.0).