Hello Mike, Monday, September 22, 2003, 1:47:50 PM, you wrote:
MK> In response to my complaint of weak rules out of box: Mike, the value of Spamassassin is its ability to weight based on a combination of factors, rather than simply delete email based on single words or phrases. Words that seem spammy to you may not be spam to everyone. For example, a urologist or a pharmacist might send and receive legitimate email containing words that would seem like spam to the rest of us. MOST spam not only has bad words in the text, but it has a number of factors related to the headers that also help weight the spam. For example, the fact that most spam is sent out by bulk mail -- I mean, how does Spamassassin tell the difference between someone legitimately trying to contact me with a business proposal (such as wanting to place ads on my website or arrange to resell some of our products) -- and the vast amount of spam that comes through purporting to be a business proposal? Spamassassin works VERY well if used in conjunction with RBL checks and Bayes, because within a very short time it becomes quite adept at spotting spam patterns. Spamassassin also allows you to adjust your own scores - for example, I have decided that for MY users (I manage an in-house server for a company that sells educational products and services) - there should NEVER be a valid reason to receive email with certain obscene language, so I added my own custom recipes to give higher scores to such words, and also increased some of the Spamassassin scores. I also used my experience with the legit mail we receive to create negative scores for words and phrases that appear frequently in mail from legitimate customers. What you should do to test SA is send some real spam through it - or simply wait and see how it does. There will always be some spam that gets through. What I do when this happens is (a) feed the spam to my Bayes database, and (b) if the headers show the actual domain that sent the spam - and it is clearly not forged - ban the IP or domain from ever sending email to my server again using my sendmail access file. Spamassassin blocks several hundred instances of spam daily, and within the same time frame I see maybe 10 or so spams leak through. Bayes is incredible -- so you really should use it and then check again with your invented spam once you have an adequate corpus of learned spam and ham. Once Bayes is involved, you will see that it often is the factor that pushes questionable email over the thresshold. Sometimes I see Bayes merely identifying a 70% of probability rather than the 99% that gives a higher score -- but basically, I seldom see Bayes get it wrong. -Abigail ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Spamassassin-talk mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
