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My poor little exchange 5.5 server cleaned 300-400 a day during the initial Klez and Melissa outbreaks. And that's only for 250 or so users. I can just imagine what MSU's numbers will be during a heavy outbreak. We currently are not running a spam filter, but have one budgeted for 2004, and I'm liking the positive detection rate and false positive rate of the new mail.msu.edu system so far. Good job guys! - Joe ----Original Message----- From: MSU Network Administrators Group [mailto:[log in to unmask]]On Behalf Of Rich Wiggins Sent: Wednesday, December 17, 2003 9:07 PM To: [log in to unmask] Subject: [MSUNAG] Percent of incoming mail stream infected with viruses The numbers will probably vary substantially. We know that a lot of student computers are infected. The students are gone, and presumably students in residence halls turned their computers off or took them away over break. A single computer infected with Klez or Sobig could generate an awful lot of virus mail when plugged into a broadband pipe. I was surprised to see Sobig.F on the list; I thought that virus had gone dormant. My guess is some infected computers have their clocks set wrong. Spam is a huge percent of e-mail that comes into MSU mailboxes -- maybe 50-60%. I bet the rate of virus e-mails varies a lot more than the rate of spam e-mails, and spammers have no incentive to mail a virus. Bottom line: number of virus e-mails as a percent of total will vary quite a bit depending on calendar and what outbreaks are new. /rich >Wow. >Thank you. > >4k out of 300k being infested is more more then I would have guessed. > >Don Bosman > > >-----Original Message----- >From: Ed Symanzik [mailto:[log in to unmask]] >Sent: Wednesday, December 17, 2003 1:50 PM >To: [log in to unmask] >Subject: Re: [MSUNAG] Anti-virus on mail.msu.edu - clarification > > >Bosman, Don wrote: >> Rich, these numbers beg the question of how many mails in total were in bound > during that 8 hour period? > >Looks like 300,000 or so.