>.... prevent people from using telnet to connect to port 25 (SMTP) on the 
>IMail server?

why do you care?

>That's impossible (there isn't any way to tell whether someone is 
>connecting with telnet, or if a program is connecting).....

no, I think some packet filters can block by tcp application protocol 
(where telnet protocol is not the same as smtp protocol).

Len


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