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Mail Services

First Class Mail

First class is used for normal correspondence.  The advantages of first class are faster delivery times, free forwarding or return of undeliverable items, and the ability to be sealed against inspection.

Priority Mail

All first class mail is eligible to be mailed Priority. First class mail weighing over 13 ounces automatically upgrades to Priority mail. Priority mail is best known as the 1-3 day service. Delivery averages 2-3 days but is not guaranteed.  Special Priority packaging for letters and packages is available from Copy/Mail.

Express Mail

Express Mail is the overnight delivery service available from the U.S. Postal Service.  Express Mail packages may be tracked to verify date and time of delivery.  Unless waived by the sender, all Express Mail items must be signed for by the recipient.  Although all zip codes are not guaranteed for overnight delivery, full refund of postage is available from the USPS if the item is not delivered within it's guaranteed time. Check overnight availability.  The package insurance of $500.00 is provided with the cost of Express Mail for the reconstruction of lost or damaged documents.  The Postal Service's liability for negotiable currency is limited to $15.00.

Standard Mail (Formerly third class)

Standard mail is mail weighing 16 ounces or less. Most large mailings of 200 pieces or more are eligible for standard mail. Standard mail usually consists of printed matter such as newsletters, booklets, and catalogs. It is a less expensive rate, but forwarding or return of undeliverable items will be charged at first class rates by the US Postal Service. All pieces in the mailing must be of the same weight and content. Contact Automation Bulk Mail for more information or questions.

Package Services (Formerly fourth class or parcel post)

Package Services is matter weighing 16 ounces or more. Package Services is divided into special rate groups for library mail, media mail and parcels. Each piece of package service mail must meet eligibility requirements and weigh less than 70 lbs.

International Mail

Most items are eligible to be mailed to foreign countries, however there are restrictions that vary by country. Letters, documents, and printed matter can be mailed internationally without customs documentation if they weigh less than 16 ounces.  Any item weighing 16 ounces or more must bear the appropriate signed customs forms or it will be returned to the sender by the U.S. Postal Service. Please contact Mail Services for restrictions and for the correct customs forms.  International mail may be sent by air or economy (surface) rates.  Airmail is generally delivered within 7-10 days. Economy (surface) rate mail can take up to 4 weeks for delivery.

Business Reply Mail

Business Reply Mail (BRM) enables departments to pay for return postage when requesting a reply from correspondents. The reply can be in the form of envelopes, cards, labels or detachable self-mailers and the department pays postage only on the pieces returned to the department.  HSC Mail Services maintains a BRM permit and account with the U.S. Postal Service.  The USPS charges a small accounting fee per piece. If you wish to use BRM, please contact Mail Services or the HSC Printing Center to have your mail piece  properly designed.

Courtesy Reply Mail

Courtesy Reply Mail (CRM) is used when the sender wants to enclose a return envelope, but does not wish to pay the return postage.  Most often used for bill payments, subscription renewals, RSVP, etc.  CRM is First class Mail and generally faster than plain envelopes and postcards.  Automation compatible envelopes can be designed by the HSC Printing Center.

Postage Due Mail

HSC Mail Services maintains a postage due account with the U.S. Postal Service to cover insufficient postage on any mail piece addressed to TTUHSC departments.  Mail pieces addressed to any HSC department that bears insufficient postage will be billed to that department plus a .20 cent accounting fee per piece.



Each card mailed as a postcard must be rectangular in shape. Minimum size is 3.5 inches high, 5 inches wide and 0.007 inches thick. Maximum size is 4.25 inches high, 6 inches long and 0.0095 inches thick. Double or folded cards must be mailed at letter rates.

Letter Mail

Minimum size for a letter is 5 inches long, 3.5 inches high, and 0.007 inch thick. Maximum size is 11.5 inches long, 6.125 inches high, and 0.25 inches thick.

Letter envelopes eclipsing these dimensions and weighing 1 ounce or less are charged an additional $0.12 oversize fee.

Flat Mail (Larger Envelopes)

Minimum size is 11.5 inches long, 6.125 inches high and 0.25 inches thick. Maximum size is 15 inches long, 12 inches high and 0.75 inches thick.


Maximum weight is 70 lbs. The length and girth of packages combined mailed through the US Postal Service cannot exceed 108 inches.

Any item larger than the maximum flat size is considered a parcel.