But do you think these programs can handle even 4 million messages per drop? My MTA will be PMTA (and/or Exim) so that should handle a good bit of delivery and shouldnt be a bottleneck. The server I will be using will also be dedicated server with quad core Intel CPUs, 16gb of ram, and SSD drives.
If both can handle 4million messages every day which do you think i should order Mailwizz or ArpReach? I am thinking Mailwizz because it has Parallel sending and should improve performance a bit. I also heard ArpReach support is not that good.
What do you guys think?