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Spam Filtering
From: "" <[email protected]>
Subject: real estate is the only way... gem oalvgkay
Anyone can buy real estate with no money down
Stop paying rent TODAY !
There is no need to spend hundreds or even thousands for similar courses
I am 22 years old and I have already purchased 6 properties using the
methods outlined in this truly INCREDIBLE ebook.
Change your life NOW !
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http://www.wholesaledaily.com/sales/nmd.htm
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Approaches
Manual Classification Hand-Coded Rules Machine Learning
Hand-Coded Rules
For example http://spamassassin.apache.org/tests_3_3_x.html “Dear Friend, …!!!!!!”
Machine Learning
Paul Graham: A Plan for Spam http://www.paulgraham.com/spam.html
Machine Learning
Advantages You don’t have to read so many spams to
recognize spam features. You know what you are measuring: probabilities
instead of mysterious scores. It automatically discovers spam features that you
may have neglected. ff0000
It considers all the evidence in the email: both good and bad.
Machine Learning
Advantages It is personalized: each user has his own spam
filter based on the actual mails he receives Pharmacy
It is evolving with the spam. Viagra => V1agra
Machine Learning
For example http://www.google.com/mail/help/fightspam/spamexplained.html
When the Gmail community votes with their clicks to report a particular email as spam, our system quickly learns to start blocking similar messages.
And machine-learning algorithms developed to merge and rank large sets of Google search results allow us to combine hundreds of factors to classify spam.
Machine Learning
For example
Machine Learning
Beyond Spam Filtering Automatic Email Classification
http://getpopfile.org/
Machine Learning
Beyond Spam Filtering Smart Labels
http://mail.google.com/mail/help/priority-inbox.html
Machine Learning
Beyond Spam Filtering Priority Inbox
http://mail.google.com/mail/help/priority-inbox.html