What File Types Can Direct Mail Equipment Use? 

Before deciding which type of printing method to use, it is important to understand what file types can be used for different campaigns. Job definition files, or JDFs, are industry standard file formats based on XML. Laser Letters are personalized pieces of correspondence that are printed on laser printers. They are often designed by an independent lettershop that takes care of the details for printing. Lines per Inch, or LPI, is a measurement of how many lines per inch a document can be printed. The higher the LPI, the better.

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Variable Logic 

With the advent of variable data printing, marketers can personalize their mailings. The technology behind this process is a combination of creativity and measurement. The use of variable data printing in direct mail equipment allows marketers to target customers one-to-one, reducing cycle times and extra fees while boosting response rates. In this article, we will explore some of the benefits of variable data printing and how it can benefit your business. 


One of the benefits of pURLs for direct mail equipment is the ability to track the results of the direct mail campaign. With pURLs, marketers can easily gather analytics and test copy, images, offers, and more. They can even export the data to Excel to create new targeted campaigns. The information gathered with pURLs is invaluable in determining what changes to make in future campaigns. If you’re looking to increase your ROI through direct mail, pURLs may be the way to go. 

Domestic Mail Manual 

The USPS maintains the Domestic Mail Manual to help customers and postal service providers understand the rules governing the delivery of mail and the services they offer. The manual explains how to prepare and package letters, package items, and other mail, as well as describes the different types of mail. The guidelines in this manual also help customers determine if their mailings are eligible for the appropriate postal service rates. Here are some common file types for the Domestic Mail Manual. 

Delivery Point Validation 

If your direct mail business is using address verification software to send mailings, then you should be aware of the Delivery Point Validation (DPV) file types. The DPV system verifies that the address you have on file is valid by comparing it against the USPS’ official address database. If the address does not match the database, the mail is deemed invalid and will not reach its intended recipients. 


Two common file formats are used by direct mail companies: DSF files and. PSD files. PDF files contain the complete list of valid US postal addresses. These files qualify the mailer for the different postal discounts that can be applied to a particular mailing. DSF files allow the mailer to save on postage and use the most efficient methods to deliver mail. They also provide the mailer with the latest in direct marketing techniques.