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"The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel." message in SendPro Enterprise, SendSuite Live, or SendSuite Xpress

The message "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel." in SendPro Enterprise, SendSuite Live, or SendSuite Xpress, it means the system is unable to connect to https://gateway.usps.com/.
Products affected: SendPro® Enterprise, SendSuite® Live, SendSuite® Xpress

Issue

When using the BPOD Splitter Tool to download BPOD files from the USPS Business Customer Gateway, the message "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel." appears.

Cause

There is an issue connecting to https://gateway.usps.com/.

Resolution

  1. Open Microsoft Edge and go to https://gateway.usps.com/.
  2. If you receive an error when connecting to the site, this needs to be resolved before the BPOD Splitter tool will be able to connect. Contact your IT department for assistance.
Important: This must be tested in Microsoft Edge because that browser is the connection used by the tool and it is the main connection to the internet for Windows-based systems.

UPDATED: August 02, 2022