Especially here. With over a million emails daily (not including Exchange traffic), we tend to be a big target. From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Martin Blackstone Sent: Tuesday, July 25, 2006 10:14 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: file filtering best practice? Right, but that would be after the 20th or so file came in. The outbreak flag wont usually fire until you are getting hammered. That's a day later and a dollar short. I agree with Jamie. Zero day / Zero hour is the concern. ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Teo De Las Heras Sent: Tuesday, July 25, 2006 6:23 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: file filtering best practice? Is there a settings where it would block zip attachments based on an outbreak? Normally your AV software should block any zip's with known viruses. The risk is that a new virus comes out, propogates via zip, and noe of the AV vendors can identify. In this case, an outbreak 'flag' would block/quarantine all zips temporarily. Teo On 7/25/06, Arnold, Jamie <harnold@xxxxxxxxxxxxxx> wrote: In dealing with zip files specifically, I' m wondering what is considered the "best practice "? We simply remove the file at our edge proxy, but have been getting a little flack from a few users. Our data shows that nearly 94% of the .zip files that come in via email are infected so I' m not likely to be convinced to allow them through. What say you?