Hello- installed this plugin without any issues.
When I'm trying to use this, sending emails seems really slow. I have set a rate of 2500 emails per hour (100 at a time) but according to Mandrill, less than 400 emails are going in an hour. Mandrill has given me a quota of over 4000 emails per hour so its not on their side.
Also, the progress bar is stuck at 0 and no tracking is being provided by MyMail. From Mandrill, I can see that the few emails are being sent/delivered/opened but not in MyMail.