Record management
One audience, cut the way you sell.
Preparation is cheaper than a damaged sending reputation. The checks happen before the first message, which is the only point they are worth anything.
Definition work
Turning a loose brief into something precise enough to count the same way twice.
Feasibility counts
How many records meet your criteria, with the criteria written out so the number can be checked.
Validation
Checking structure and reachability before a file is used, not after.