I would love to do this. How do people deal with the sender reputation side of things, email servers is one area I've stayed away from and just let the big 2 ha

I would love to do this. How do people deal with the sender reputation side of things, email servers is one area I've stayed away from and just let the big 2 handle how is the queue handled? granular APIs for multi tenants? what about monitoring/quee health etc?