If you are experiencing issues with PostalOne! or submitting Mail.dat files to the USPS using the batch mode, please use the contact information below:
Mail.dat and User Access – Customers that experience issues using Mail.dat to send files to USPS using the batch mode need to contact the desk at 1-800-522-9085 to verify their username and password.
PostalOne! Assistance – Please call the PostalOne! help desk at 1-800-522-9085 if you have any questions, problems accessing your accounts, or problems submitting electronic documentation.
PostalOne Help Desk
Moderators: Steve, Terry, Donna, Dave, Eric, MartyH, Kristen, Chrissy, Geoff, Vince