BACK TO GLOSSARY

USPS Marketing Mail is mail matter not required to be sent as "First-Class Mail" or "Periodicals". Essentially, synonomous with bulk mail.

From USPS.com

" Mailers use USPS Marketing Mail to send:

 • Printed matter, flyers, circulars, advertising.
 • Newsletters, bulletins, and catalogs.
 • Small parcels."

See "USPS Bulk Mail". https://pe.usps.com/BusinessMail101?ViewName=StandardMail