The request message has ReplyTo='{0}' but IContextChannel.RemoteAddress is '{1}'. When ManualAddressing is false, these values ...

The request message has ReplyTo='{0}' but IContextChannel.RemoteAddress is '{1}'.  When ManualAddressing is false, these values must be the same, null, or EndpointAddress.AnonymousAddress because sending a reply to a different address than the original sender can create a security risk.  If you want to process such messages, enable ManualAddressing.