Can I use only NAVIEG but no IMGate???
yes of course, but the pb is that all of these AV scanners don't have anti-relay (ie, "Relay for Addresses" type setting) so they run as open relays, the dumb@sses, so when you run the AV scanner as the gateway SMTP server to Internet (in DNS as MX), then the spammers will kill you and/or the black hole services will black list you.
however, if you haven't bought NAVIEG yet, take a look at www.GFIcomms.com for Mail Essential for SMTP. It has anti-relay. Not a huge "brand name", but GFI does good work.
Using IMGate as the gateway to internet solves the relay pb, AND gives you anti-spam defense so the traffic passed by IMGate to the AV + Imail machines is cleaned up, lessening the load on the AV scanner. Nothing more stupid than AV machine scanning spam!
Len
Len
http://BIND8NT.MEIway.com: ISC BIND 8 installable binary for NT4
http://IMGate.MEIway.com: Build free, hi-perf, anti-spam mail gateways
