Mailing & Shipping Solutions Center (MSSC) to Merge With the PostalOne! Helpdesk

Effective July 1, 2021, the external PostalOne! Helpdesk will merge into the Mailing & Shipping Solutions Center (MSSC). Customers will need to contact the MSSC with any PostalOne! issues. The current PostalOne! help desk number of 1-800-522-9085 will automatically forward to the MSSC @ 1-877-672-0007. In the Interactive Voice Response (IVR), customers will select option 2 (MSSC) and then option 3 (PostalOne!) for assistance.

The current email address PostalOne@usps.gov will remain active and be routed to the MSSC.

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