I am receiving an error message from your test servers where the error code is 2147219093 and the description is in regards to an invalid character.  However, even when I hard-code the HTTP request string (rather than build it dynamically) with the information and send it I am receiving an error code from the USPS test servers.  More interesting, when I copy the endpoint text from the logs in Salesforce I am able to get a response from the test servers when making the request manually using a browser.  The relevant portion of my Salesforce log is listed below.  I get a status code of 200 but it is then followed by an error bad character reference?  Has anyone worked with the USPS web tools that can offer suggestions?

10:09:42.083 (83092000)|SYSTEM_METHOD_ENTRY|[38]|System.Http.send(APEX_OBJECT)

10:09:42.083 (83192000)|CALLOUT_REQUEST|[38]|System.HttpRequest[Endpoint=http://testing.shippingapis.com/ShippingAPITest.dll?API=Verify&XML=<AddressValidateRequest USERID="801CL"><Address ID="0"><Address1></Address1><Address2>6406 Ivy Lane</Address2><City>Greenbelt</City><State>MD</State><Zip5></Zip5><Zip4></Zip4></Address></AddressValidateRequest>, Method=GET]

10:09:42.327 (327010000)|CALLOUT_RESPONSE|[38]|System.HttpResponse[Status=OK, StatusCode=200]

10:09:42.327 (327083000)|SYSTEM_METHOD_EXIT|[38]|System.Http.send(APEX_OBJECT)

10:09:42.327 (327137000)|SYSTEM_METHOD_ENTRY|[39]|System.HttpResponse.getBody()

10:09:42.327 (327212000)|SYSTEM_METHOD_EXIT|[39]|System.HttpResponse.getBody()

10:09:42.327 (327250000)|SYSTEM_METHOD_ENTRY|[39]|System.debug(ANY)

10:09:42.327 (327264000)|USER_DEBUG|[39]|DEBUG|USPS http request: <?xml version="1.0"?><Error><Number>-2147219093</Number><Source>;SOLServerTest.Verify_Respond</Source><Description>Error Loading XML:  A name contained an invalid character.

</Description><HelpFile></HelpFile><HelpContext></HelpContext></Error>

Hi all,

Hope you all are well.

I am just wondering if it is technically possible to transfer to data (name, email & phone no) from a form on our website (built using .aspx) onto a form on our SF site page.

The idea is when a client fills out the name, email & phone no on our enquiry form (.aspx) when then they submit that details our Salesforce Site form comes up with the same details fill up automatically in the relevant fields. 

Is it possible to achieve? If so, could someone let me know how it can be achieved?

Many thanks