In the hour after sending a Mailpoet newsletter, my server struggles to handle processing all the clicks on the email, with the CPU maxing out and getting 503 errors. Part of this is it's collecting click statistics

One thing that I can think of that would help a lot is if I could adjust the delivery speed of a newsletter so they don't all get delivered at once at the 50K/hour rate. Maybe having an option when sending each newsletter to limit sending speed, eg. I might want to try limit the rate to 3 thousand emails per hour in my use case.