If you hear that Endicia is not rating properly and you see this error ("the underlying connection was closed") popping up when trying to Rate a Direct Service (eg. Priority Mail), look at the Registry and make sure the Web Service is pointing at the newer "4.5" version.
Endicia/USPS - "the underlying connection was closed" Error Print
Modified on: Tue, 14 Aug, 2018 at 11:20 AM
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