What’s the minimum quantity to qualify for mailing? We offer direct mailing for three products: postcards, brochures, and rack cards. The minimum quantity for all three is 500 pieces. To learn more, check out our Help Center post “How does direct mail work?”. You Might Also Want to ReadHow do I rent a mailing list?How long will it take to deliver items through direct mail?What mailing services do you offer?What are your direct mail requirements?