Bulk Mail

A great way to save your department money when sending out large amounts of mail is to send it as bulk (a.k.a. [also known as] business) mail. Please contact Troy McFarland (troy.mcfarland@utdallas.edu / 972.883.4941) for help in designing a mail piece that qualifies for USPS [United States Postal Service] bulk mail rates, or for standard non-profit mail rates.



Mail Services Requirements for Bulk Mail

In order to help you send out bulk mail, Mail Services will need to know—

Choosing Between Non-Profit and First Class Rates


  Non-Profit First Class
Minimum Quantity for Discount Price 200 pieces or 50 lbs 500 pieces
Size and Weight Requirements Used US Standard Mail US First-Class Mail
Design Standard Used Standard Mail Flats (PDF [Portable Document Format File] ) Standard Mail Flats (PDF [Portable Document Format File] )
Relative Speed Slower Faster
Relative Price Cheaper More Expensive

USPS Requirements for First-Class Bulk Mail

Minimum Quantity

Your mailing must consist of 500 or more addressed pieces. If you’d like to mail some pieces at card prices and some pieces at letter prices, you must mail at least 500 of each.


You must have a permit indicia imprint on the envelope.


Addresses on all pieces must be updated within 95 days before mailing through a USPS [United States Postal Service] -approved address update method. The most common method is to add the phrase “Return Service Requested” directly under the return address, which itself should appear in the top left corner of your mail piece. See USPS [United States Postal Service] Quick Service Guide 507: Ancillary Service Endorsements for other options.

Placement of Endorsements

Your department will pay the full price of any mail piece that gets returned for an address correction.

Please see USPS [United States Postal Service] Quick Service Guide 230a: Move Update Standard for more information.

Machinable Design

The design of your mail piece, in particular its dimensions and weight, will affect postage. The USPS [United States Postal Service] offers a Business Price Calculator to help you estimate how much these factors will cost. Other factors could change the final cost. For example, a design that is not machinable, that is, one that cannot be run through a post office’s automatic sorting machines, will cost more.

To send at the cost of letters, mail pieces must be rectangular (squares cost more) and fit within the following size limits:


Letter Sizes
Dimension Minimum Maximum
* The thickness of an index card.
  If in doubt, ask your local USPS [United States Postal Service] Mailpiece Design Analyst to measure your mail piece.
Height (perpendicular to address) 3 1/2 inches 6 1/8 inches
Length (parallel to address) 5 inches 11 1/2 inches
Thickness 0.007 inch * [Thickness of an index card. If in doubt, contact your USPS Mailpiece Design Analyst.] 1/4 inch

Many mailers fold sheets of paper to form letter-size pieces or newsletters. Folded pieces, or folded self-mailers, can save time and money because you’re not paying for –nor stuffing– envelopes. Folded self-mailers must be sealed to be machinable. We recommend placing the fold on the bottom (the side below the address) and secure the opening at the top with a piece of tape, a tab or a wafer seal.

For more design guidance, please see:

For even greater savings, ask your USPS [United States Postal Service] District Business Mail Entry Office for the special size requirements of letters sent at automation prices.

ZIP Code

Each piece must include a complete delivery address with correct ZIP code or ZIP+4 code.


Mail must be sorted in ZIP code order, from the smallest ZIP code to the largest. One good way to sort your mailing is to separate your pieces into several different mail trays. Mail trays are available on request by contacting Mail Services (mail@utdallas.edu / 972.883.2779).