Do you know approximate cost of these two spam catchers?
On 11/27/06 11:12 AM, "Rupprecht, James R" <[EMAIL PROTECTED]> wrote: > We used the Exchange IMF and were very unhappy with it. Lots of false > positives and false negatives. The lack of a global whitelist was also > an issue (yes, I know there are third-party products and some clever > work-arounds for this). > > We evaluated a lot of the enterprise-class anti-spam products out there > and found two that stood above the rest. The one we ended up > implementing was Sophos PureMessage. The other was from a company called > ProofPoint. Both were exceptional. The ProofPoint product (which can be > implemented as either an appliance or as software on your own box) was a > little more expensive but a bit better on catching some of the newer > spam techniques (image-based spam in particular). The Sophos product is > also very good. Both products run on RHEL. PureMessage comes in an > Exchange flavor but I can not recommend it at this time. > > In our environment at last check the numbers look like this.... > > 44% Dropped before delivery - Blocked or Blacklisted by IP or host name. > 20% Dropped before delivery - Certain spam. > 10% Tagged and delivered to the JUNK E-MAIL folder - Probable spam. > 26% Delivered normally - Probable valid messages. > > Our inbound mailflow ranges from 500,000 to 750,000 messages per day. > > In terms of the first two, we have the systems set very conservatively. > We archive the dropped messages and audit them to ensure we are not > throwing away valid mail. The systems have been in place three months > and we have not found or heard of a single valid message that has been > dropped. We also are seeing that better than 99 percent of the tagged > messages are also spam. > > Regards, > > James Rupprecht > Senior Systems Specialist > Microsoft Exchange and Active Directory Administrator > Enterprise Academic Systems > University of Kansas Information Services > 1001 Sunnyside Avenue, Room 103 > Lawrence, KS 66045 > USA > INT: jimrupprecht at ku.edu > TEL: 785/864-0116 > > > > > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Larry > Wahlers > Sent: Wednesday, October 04, 2006 9:02 AM > To: Exchange Discussions > Subject: RE: IMF > > > Sorry to intrude, but on a related note, we're looking to change from > our current anti-Spam software to something else - either IMF or SMSMSE. > Does IMF cost extra cash, or is it included in Exchange 2003? For those > of you using SMSMSE, is the anti-Spam part included or does it cost > extra? > > Thanks for any replies, and sorry for the interruption. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
