Sending in groups won’t make it go out any faster.
You can pick any size you want (i’d suggest setting a cron job to automatically process the queue and the bounces).
Actually I get stuck in it, I made groups of 10,000 emails for each group
I am trying to send the same campaign to every group alone and when I press on Process the Queue the screen will stop in the Stop Processing page
So, I want to ask is it sending the campaign, while I am seeing that screen ? because it stays the whole day like that