VERIFIED SOLUTION i

How do you contact the USPS PostalOne! HelpDesk

PostalOne! contact information is found here (as-of July 2015)-
https://www.usps.com/postalone/contact.htm

The site has the following contact information-

Our trained and friendly Customer Care Center staff is eager to assist you. They will:
    Explain current features and benefits that are available to you.
    Guide you through the application process and explain the user agreements, request for computer access process, and site administrator’s role.
    Answer technical questions about the PostalOne!® system, help with passwords, system logon, and clarify the file testing and transmission processes.

e-mail us: 
postalone@email.usps.gov

Call us:
(800) 522-9085

Or write to us:
PostalOne! Customer Care Center
USPS-NCSC
225 N. Humphreys Blvd Ste 501
Memphis, TN 38188-1001
UPDATED:  April 21, 2017