>Mark: > >I'll admit freely that I don't have enough information to answer your >questions about SMTP vs. LSMTP and how NAV 2000 works procedurally. NAV >2000 has identified one virus-laden e-mail file in the SMTP/LSMTP system >since July 1, 2000, and that file was stopped from distribution. > >As for performance, we only move about 1 - 1.5 million messages a month, >usually in batches of a few hundred to a few thousand at a time. So, >performance isn't really an issue for us; messages are processed quickly >and the mail server is idle most of the time. I don't have any first-hand knowledge of Norton Antivirus and the portion of their website devoted to the product seems singularly devoid of information on what it's actually supposed to do, apart from a vague impression that it has something to do with getting viruses. (I may just not have looked hard enough.) So I can't speak specifically as to how NAV works or what effect it would have on performance. Generally speaking, though, I'd say that you'd have to expect that any antivirus system that is to intercept incoming viruses would have _some_ effect on performance. It should be possible to minimize that effect if you can configure the software to only intercept and scan incoming messages, though. This would leave LSMTP to send outgoing messages unimpeded, which is really where you see the biggest performance gains when you use LSMTP. From a virus security standpoint this shouldn't be a problem, either, as in order for LISTSERV to distribute a message containing a virus it first has to receive a message with a virus. I'm speaking fairly theoretically here so some testing of any system you are thinking about using is in order, but the above seems correct to me. Does anyone else have any experience with this? Thanks, -- Jacob Haller, Technical Support L-Soft international, Inc http://www.lsoft.com/