This is what I would do as well. Coming from a hosted mail solution (one of the earliest in the Industry as part a of the initial Dotcom bubble) that cost 1000

This is what I would do as well. Coming from a hosted mail solution (one of the earliest in the Industry as part a of the initial Dotcom bubble) that cost 10000x5+thensome as much to run, albeit with higher send rates and clusters, It totally makes sense to use ec2 for these needs today.