MSMQ 3.0 on WinXP and Win2k3 Unable to Send WCF messages to Win2k8 and higher – Error The Signature is Invalid.

Customer was running a WCF application on WinXP. His WCF app messages were ending up in the deadletter queue with error “The Signature is Invalid.”   We changed the security Configuration to <security mode=”None”> <transport msmqAuthenticationMode=”None” msmqProtectionLevel=”None”/> <message clientCredentialType=”None”/> </security> Also, useActiveDirectory=”false”  Now we get access is denied error More Information Thanks to James Birdsall,…