I think that I was pretty clear about this in the sentence before
the one that you quoted.
with an front-end MX like IMGate taking raw Internet inbound, you can
really shut down via firewall access to the SMTP service, almost
completely hardending the SMTP service against attacks.
1. the firewall :
a. permits access to Imail port 587 for SMTP-AUTH only.
b. re-directs Imail port 25 to Imail port 587.
> Those looking at a gateway specifically to resolve this issue will
mostly not find a complete solution due to not being able to firewall
their servers from the Internet.
Exactly. Anyone not running packet-filtering firewall in front of
them mail system is really asking for trouble.
Len
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