>I'm  afraid you're going to have to get your mind around pushing out a
>port change to your users <snip>
>--Sandy

Certainly I'm not ruling it out completely, but I think there are other
things to try first. And like you say, how long before the port scanners
start trying other ports looking for "EHLO"s? 

I'm not going with IMGate for an inbound firewall simply because I think the
upkeep will be too time-consuming. However, as an outbound SMTP firewall I
simply need it to do one thing: SMTP AUTH proxy. Once that is working upkeep
should be minimal to non-existant.

~Brad 


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