Every marketing email needs honest sender details, a working unsubscribe honored within 10 business days, and your physical postal address. The Federal Trade Commission publishes the details.
CAN-SPAM Act
The US law that sets rules for commercial email, including unsubscribes and a postal address.
See it running on your own catalog
Purity does the work these terms describe: batches held until their lab report is in, payments matched to orders, and wording checked before it sends.