Which type of mailing requires a minimum of 500 pieces?

Marketing Mail is designed for bulk advertising and promotional materials, and it indeed requires a minimum of 500 pieces to qualify for its pricing and service standards. This requirement supports cost-effective bulk mailing, making it economically viable for businesses aiming to reach a large audience with marketing materials.

The other mailing types have different criteria: First-Class Mail is primarily used for personal correspondence and has no minimum quantity requirements, allowing users to send one piece at a time. Periodicals are typically used for publications and may also vary in their requirements based on the publication schedule and frequency. Media Mail has specific content restrictions but does not necessitate a minimum number of pieces either. Hence, Marketing Mail stands out as the option that explicitly supports bulk mailing with its minimum requirement of 500 pieces.