When you set up a new Microsoft Exchange 2003 Server You get the following default SMPT Banner
220 internal.domain.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at Thu, 20 Sep 2007 20:00:00 –0500
To change this you need to do two things:
Change the FQDN address in Exchange System Manager
Open Exchange System Manager.
Right-click YourServerProtocolsSMTPDefault SMTP Virtual Server (or your SMTP virtual server) and select Properties.
On the Delivery tab, click Advanced…
Under Fully-qualified domain name: enter the name you want to broadcast to the world.
Change the banner message
goto the folder Drive:InetpubAdminscripts and execute this:
cscript adsutil.vbs set smtpsvc/vsi number/connectresponse “Your Text”. Thos Changes the “Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at” to “Your Text”
The vsinumber is usually 1 (the number of your SMTP host).