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Text of the page (random words):
spambayes bayesian anti spam classifier written in python sf project page frequently asked questions about the project home page background documentation applications reviews quotes developers related donate platforms windows unix linux mac os getting the code releases subversion access contact us contact details news spambayes 1 1a6 is now available this includes both the source archives and a windows binary installer see the download page for more info or select an appropriate version from the table below you may also like to see what other people have been saying about us in the press and elsewhere download spambayes locate the row which contains your operating system and mail program to see which version of spambayes is right for you if you can test any of the configurations please let us know note that installing a source release is more involved than the binary releases please try the test releases if at all possible while they are still labelled as alpha they are really quite stable we re just extremely conversative lazy about doing beta final releases mail program operating system stable release test release notes outlook 2010 windows 7 1 1a6 1 1a6 a number of people have reported that spambayes will not work on windows 7 unless you install it in a non default location installing in c spambayes should do the trick outlook 2000 2003 2007 2010 windows xp vista 1 1a6 1 1a6 if some combination of windows and outlook versions isn t listed please give it a try anyway 64 bit support is currently problematic windows 3 1 me are not supported nor are outlook versions outlook express windows xp 1 1a6 1 1a6 windows live mail windows xp vista 7 1 1a6 1 1a6 untested it should work at least as well as outlook express though other windows xp vista 7 1 1a6 binary 1 1a6 source source code for the rest of the windows world binary installer also might work in some circumstances incredimail windows xp vista 7 1 1a6 source completely untested may work with pop3 rudimentary imap support may prevent that protocol thunderbird 2 x any thunderbayes tighter integration similar to outlook plugin uses 1 0 4 thunderbird 3 x any thunderbayes thunderbayes extended to work with thunderbird 3 x thunderbird 6 is not yet supported thunderbird 6 x any 1 1a6 source thunderbayes is not yet supported on thunderbird 6 gmail any 1 1a6 source pop3 works imap probably not yahoo mail any 1 1a6 source completely untested pop3 imap msn hotmail any 1 1a6 source completely untested pop3 imap aol mail any 1 1a6 source completely untested imap only any mac os x linux solaris 1 1a6 source pop3 imap etc be prepared to get your hands wet what is spambayes the spambayes project is working on developing a statistical commonly although a little inaccurately referred to as bayesian anti spam filter initially based on the work of paul graham the major difference between this and other similar projects is the emphasis on testing newer approaches to scoring messages while most anti spam projects are still working with the original graham algorithm we found that a number of alternate methods yielded a more useful response this is documented on the background page spambayes is not a single application the core code is a message classifier however there are several applications available as part of the spambayes project which use the classifier in specific contexts for the most part the current crop of applications all operate on the client side of things however a number of people have experimented with using spambayes on mail servers to classify incoming mail for multiple users the table below outlines the main applications which are part of the spambayes distribution application description outlook plugin a plugin for microsoft outlook which tightly integrates classification and training into the outlook interface pop3proxy sb_server a mail filter which sits between the user s pop3 server s and the user s mail client and presents a web based training interface imapfilter a mail filter similar to pop3proxy but which talks the imap protocol hammiefilter sb_filter a simple mail filter suitable for embedding in a procmail environment that s great but what s spambayes the non technical hand waving answer spambayes will attempt to classify incoming email messages as spam ham good non spam email or unsure this means you can have spam or unsure messages automatically filed away in a different mail folder where it won t interrupt your email reading first spambayes must be trained by each user to identify spam and ham essentially you show spambayes a pile of email that you like ham and a pile you don t like spam spambayes will then analyze the piles for clues as to what makes the spam and ham different for example different words differences in the mailer headers and content style the system then uses these clues to examine new messages for instance the word nigeria appears often in spam so you could use a spam filter which identifies anything with that word in it as spam but what if your business involves writing a guidebook on nigerian wildlife conservation clearly a more flexible approach is necessary additionally spammers will adapt their content over time and will no longer use the word nigeria or the words lose weight fast or any number of other common lines ideally the software will be able to adapt as the spam changes so that is what spambayes does it compares the spam and the ham and calculates probabilities for instance for me the word weight almost never occurs in legitimate email but it occurs all the time in lose weight fast spam spambayes can then look at incoming email extract the most significant clues and combine the probabilities to produce an overall rating of spamminess it flags the messages so that your mailer can handle the different message types you might set it up so that ham goes straight through untouched spam goes to a folder that you ignore or delete without checking and the unsure messages go to another folder which you can review for errors how is spambayes different there are a number of similar projects to spambayes most are just using the original paul graham algorithm examining the graham technique with careful testing showed that it did a remarkably good job but there was considerable room for improvement see the background page for more the spambayes team tinkered with new algorithms tweaking existing algorithms and most importantly did enormous test runs slamming tens of thousands of messages against each other in an attempt to quantify whether or not a change to the system was beneficial the new algorithm is a combination of work from gary robinson and tim peters and provides not just a spam and ham rating but also an unsure rating for those messages where it can t work out how to rate the message see the background page for more well background the code implemented in python is currently available from a variety of methods from the downloads page there are now a couple of end user applications available for those excited by the bleeding edge these are detailed on the applications page and available as part of the source download credits most of the heavy lifting on this project was done by tim peters with the cast of spambayes obsessive compulsives providing ideas heckling and testing gary robinson provided a lot of the serious maths and theory as well as his essay on how to do it better see the background page for a link rob hooft also contributed maths stats clues mark hammond amazed the world with the outlook2000 plug in with tony meyer sean true and adam walker making significant contributions and richie hindle neale pickett tim stone worked on the end user applications thanks also to rachel holkner for turning anthony s gibberish into something closer to actual english although all mistakes are anthony s