Rated 4 out of 5 stars

Very nice, easy to use, fast, great to write personal messages in the subject field.
The only problem I had is with my mail server. Sending 50 mails. Mail Merge opens too many concurrent connections and my mail provider does not like, closing all connections.
Anyway to spped down or limit how many connections are open at the time?

Regards

This review is for a previous version of the add-on (2.5.0).