Start with a Batch of Ten

Don't ask a bot for 600 emails. Ask for 10. Read each one, tell the bot what to tweak, and have it rebuild the batch. Then do 20, then 50, then 200.

A line you can paste: write 10 of these, stop, and wait for my notes before you do more.

Small batches also get you the questions, like what about this one, that a big run never asks. The full loop is in A Guide to Managing Your Bots: Human in the Loop.