How can I modify the default "SMTP Banner" in Trend Micro IMSS 5.x? The objective is to match the banner with the public MX record because the Active Directory Domain Name is different than the public MX record. This is causing our emails to be reported as spam when popular email service providers run RDNS against our SMTP server and it resolves in a different one.
A popular online diagnostics website http://www.mxtoolbox.com
also reports us that "reverse DNS does not match the MX record".
I already know how to do that in Exchange Server 20xx and have tried modifying IsntSMTP.ini file in the IMSS directory but no luck.