What is the required element in the sequence for USPS Marketing Mail automation letters?

The required element in the sequence for USPS Marketing Mail automation letters is MXD. This element refers to the Mailer Identifier (MID) that helps in identifying the specific mail piece for automation purposes. The MXD is an important part of the address block of marketing mail, ensuring that the mail is processed efficiently through automated systems.

Using the correct MXD indicates that the mail piece meets the criteria for automation discounts, which helps mailers save on postage costs. It ensures that the mail can be sorted effectively and delivered quickly, making it essential for successful marketing campaigns.

Understanding the role of MXD in the sequence allows mailers to comply with USPS standards for marketing mail, thus ensuring that their mailings are eligible for automation processing, which enhances overall delivery efficiency.