I have my config file set up with a batch size of 240 and throttled to one email every 15 seconds. At this rate, my 3,200 emails should have finished sending in 14 hours.
The status column in the queue list has been indicating that it's processing at about 130 per hour (give or take 20). It's been 26 hours and there are still over 500 messages left in the queue.
I'm curious to know what would be causing this discrepancy.