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Posted to commits@spamassassin.apache.org by Apache Wiki <wi...@apache.org> on 2008/05/26 18:32:33 UTC

[Spamassassin Wiki] Update of "Rules/MIME BASE64 TEXT" by LeeMaguire

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The following page has been changed by LeeMaguire:
http://wiki.apache.org/spamassassin/Rules/MIME_BASE64_TEXT

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  === Explanation ===
  
- <explanation of the rule goes here>
+ The message contains text that has been encoded using Base64 content transfer encoding but does not use a character set known to require it.  This does not apply to text in the UTF-8 or big5 character sets.
+ 
+ This technique is assumed to be used by spammers as a form of obfuscation, presumably to bypass filters that are not MIME-aware.
+ 
  
  === Further Info ===
  
  The default scores for this rule can be found [http://spamassassin.apache.org/tests.html in the online list of tests].
  
+ For details on Base64 encoding see [http://www.apps.ietf.org/rfc/rfc2045.html#sec-6.8 RFC 2045 sec 6.8]
+ 
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  CategoryRule