I have a customer who has an Internet Domain (say 'mydomain.com'), and another internal domain (say 'mylocaldomain.com'). A single mail server downloads the mails from mydomain.com, working through the ASA5510. mydomain.com is being used to exchange mails with external users. For internal mails, users send/receive mails on mylocaldomain.com. Since the same mail server serves for both mydomain.com and mylocaldomain.com, my query is, how do I ensure that all the local mails headed for mylocaldomain.com are scanned etc. by CSC/SSM? Mylocaldomain.com is not published on the internet. The mail server for both the domain is common, and is located on the Internal LAN. Do I need to shift my mail server to DMZ for getting it to work the way we want it? Thanks in advance.