I cannot find information on this error. I am getting this error ona new E2K7 install when I try to test sending messages, I get a bounce with this error 550 Administrative prohibition - envelope blocked. Does anybody have an idea?

Did you get a chance to look into this http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_24679520.htmlI have don e some research and does nt look like exchnage is sending these NDR's. Some other devcie might be sending thesehttp://www.mydigitallife.info/2007/07/24/exim-sender-verify-callout-or-callback-could-not-complete-or-verification-failed-error/Raj

Hi, Would you please describe the issue more detailed? Whether the error is encountered when an internal user sends a message to external recipient? Would you please post the message header of the NDR message here? Please also let me know the server name and the ip address of the Exchange Hub Transport server Server. Thanks,Mike