may need to go this route
http://ribbs.usps.gov/files/NCOAlink/DIST_INFO/DIST_CERT_PROC_V6.2.PDF

Dave Tenerowicz sent the following on 11/13/2007 2:41 PM:
> We've encountered a puzzling issue with postal service rate estimation.
> Wonder if anyone else has encountered authentication issues with USPS?
> 
> Prior to our testing, we obtained an USPS account number and access
> credentials (accountId, password, etc). We reviewed the api details from
> USPS and put the values for access credentials  in the
> shipment.properties file in OfBiz.
> 
> However when we test, we receive authentication errors, and as a result
> do not receive rates back. We are certain that we are using the correct
> authentication values from USPS.
> 
> Has anyone else encountered this sort of issue accessing USPS and
> retrieving estimated rates?
> Any suggestions?
> 

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