Re: Spam blocking and false positives
Cisco IronPort. Nil on the false positives so far, and we've had it a couple of months. The content filters pull some false positives, for obvious reasons, but they are easy enough to tune. 2009/12/15 Steve Hart sh...@wrightbg.com Would anyone be interested in sharing what anti-spam solution you're using and what the rate of false positives is? -- On two occasions...I have been asked, 'Pray, Mr Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.
Re: Spam blocking and false positives
GFI Mail Essentials 14.1 utilizing the directory harvesting protection feature. After some considerable tweaking we have had no false positives in 4 months. About 10,000 emails per day. Cheers. On Tue, Dec 15, 2009 at 11:56 AM, Steve Hart sh...@wrightbg.com wrote: Would anyone be interested in sharing what anti-spam solution you're using and what the rate of false positives is?
Re: Spam blocking and false positives
VIPRE with RBL blocking using spamhaus will give you 0 false positives. But you'll need to tweak the settings a bit to increase the catch levels, but once done it's pretty much set and forget with rare FP's. Roger Wright ___ On Tue, Dec 15, 2009 at 12:56 PM, Steve Hart sh...@wrightbg.com wrote: Would anyone be interested in sharing what anti-spam solution you're using and what the rate of false positives is?
RE: Spam blocking and false positives
Vipre from Sunbelt Software, and 1%. Sean Rector, MCSE From: Steve Hart [mailto:sh...@wrightbg.com] Sent: Tuesday, December 15, 2009 12:57 PM To: MS-Exchange Admin Issues Subject: Spam blocking and false positives Would anyone be interested in sharing what anti-spam solution you're using and what the rate of false positives is? Virginia Opera's 35th Anniversary Season The One You Love Celebrate with a 2009-2010 subscription: La Boh?me?|?The Daughter of the Regiment?|?Don Giovanni?|?Porgy and BessSM Visit us online at www.VaOpera.org or call 1-866-OPERA-VA The vision of Virginia Opera is to enrich lives through the powerful integration of music, voice and human drama. This e-mail and any attached files are confidential and intended solely for the intended recipient(s). Unless otherwise specified, persons unnamed as recipients may not read, distribute, copy or alter this e-mail. Any views or opinions expressed in this e-mail belong to the author and may not necessarily represent those of Virginia Opera. Although precautions have been taken to ensure no viruses are present, Virginia Opera cannot accept responsibility for any loss or damage that may arise from the use of this e-mail or attachments.
Re: Spam blocking and false positives
On Tue, Dec 15, 2009 at 09:56, Steve Hart sh...@wrightbg.com wrote: Would anyone be interested in sharing what anti-spam solution you're using and what the rate of false positives is? I have put up Maia Mailguard here. Personal Stats: Efficiency 98.94% False Positive 0.10% False Negative 0.96% Sensitivity 96.79% PPV 99.67% Specificity 99.86% NPV 98.64% Site-wide Stats: Efficiency 92.38% False Positive 0.05% False Negative 7.57% Sensitivity 90.50% PPV 99.92% Specificity 99.73% NPV 72.81% Of course, the site-wide FP stats (and others) are dependent on the users rescoring the emails. Mine are accurate, as I'm a real hawk on training and classifying - the others, well, not so much... Kurt
RE: Spam blocking and false positives
We use SpamTitan - we get about 4,000 messages a day. About 800 are clean, the rest are blocked. I can't remember the last time we had a false positive, and we get few false negatives - I personally had maybe 3 or 4 false negatives in the past year. Ralph From: Steve Hart [mailto:sh...@wrightbg.com] Sent: Tuesday, December 15, 2009 12:57 PM To: MS-Exchange Admin Issues Subject: Spam blocking and false positives Would anyone be interested in sharing what anti-spam solution you're using and what the rate of false positives is? Confidentiality Notice: -- This communication, including any attachments, may contain confidential information and is intended only for the individual or entity to whom it is addressed. Any review, dissemination, or copying of this communication by anyone other than the intended recipient is strictly prohibited. If you are not the intended recipient, please contact the sender by reply email, delete and destroy all copies of the original message.
