SMTP Security

Sorry, this is slightly off the ISA topic

I have heard that it is a security no-no to have your SMTP server reply with
the following when connecting to it through telnet. 

"220 <hostname>.<domain>.com Microsoft ESMTP MAIL Service,
 Version: 5.0.2195.1600 ready at Thu, 30 Nov 2000 18:09:43 -0600"

Does anyone know how to disable this response?

John Burridge

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