09-23-2020, 07:52 PM
Given the nature of so many different email servers I would say that something just high maybe 60 or 90 or 120 or maybe even like 500 would probably work ultimately. However I think it would probably take some trial and error and there's not going to be a magic perfect solution because you're dealing with lots of servers whereas with rank tracker it's only one to 3 servers depending on how many engines you are using.