Services Send packages via domestic and international mail through USPS, UPS, and Fed Ex. Mail picked up daily by USPS, UPS, and Fed Ex. Buy stamps in singles, books of 10 or 20, or rolls of 100; postcard stamps and international stamps are also available. Buy mailing supplies including: business-size letter envelopes, large envelopes, and padded and bubble mailers. Free packaging available for USPS Priority Mail and Priority Mail Express, including flat-rate envelopes and boxes. Free recycled boxes and mailers on-hand. Pitney Bowes Send Suite generated email messages for students, faculty, and staff when items with tracking arrive.