1. Is it possible to hide or modify the Send Connectors' FQDN which responses to HELO or EHLO command in the Internet headers? For example, to hide or modify the infomation like: " Received: from unknown (HELO mail.domainA.com) ([xxx.xxx.xxx.xxx])"2. Is it possibe to hide, or remove, or modify the Generation server: mail.domainA.com from the Undeliverable notofication? For example "Sent by Microsoft Exchange Server 2007 Diagnostic information for administrators: Generating server: mail.domainA.com "

no. you cannot change the part after "diagnostic information for administrator".

Hi,I agree with Satgurnmss.We cannot remove or hide these information.As a workaround, I think we can redirect all the NDR to administrator mailbox to center manage NDR purpose.Regards,Xiu

Satgurumss & Xiu,Thank you very much for your information. I have decided to change the Active Directory domain name with a newly registered domain.Thanks again.Liu Lin