As i am having a lot of troubles with spam, in my network I want to use spamassassin with sendmail (i will use Fedora) as a gateway for the internet incoming mail.
But i have never used spamassassin before.
I took a look on documentation of the spamassassin and it seems to me highly technical.
Mailservers are in general highly technical, so the level of writing in most SA documents are fairly technical. Some if this is as a result of being written by technical people, and some of it is as a result of some of the topics just being technical themselves.
I was looking for something easier, a guide that explains how spamassassin works (because i do not know even the principles it uses),
An overview of how SA works is simple.. I'll explain that here.
When a message is fed to SA, it is checked against a large set of rules. These rules search for a variety of text strings, strange html tags, odd routing, forgeries, etc. Some optional rules also check IP's in the message headers against DNS blacklists, or check the message against spam-hash systems such as razor, or against a trainable bayes tokenizer.
Each rule has a score assigned to it by a fairly complicated testing process when spamassassin is built (they are tested against a corpus of spam and nonspam email, and a Genetic Algorithm is used to "best fit" all the scores). The scores of the rules are totaled up, and if the total score over the spam threshold, it's declared spam.
what are the configuration files and how to change them to make use of its features and how to install it on fedora (redhat).
This part is at least introduced in the README file under "customization".
Detailed descriptions of the options can be found in the manpage: man Mail::SpamAssassin::Conf
Does anybody know where i can find such information ??? Website, manuals etc.
Googling didn't help me. Hopefully some of you will give good suggestions for a spamassassin beginner.
That should get you started, let me know if there are holes you want covered.
There's also a FAQ which can be quite usefull: http://spamassassin.taint.org/faq/index.cgi?req=index
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