SpamAssassin
"SpamAssassin" is a script project designed to analyze the content of messages for detecting spam. Messages detected as spam are then marked using a point-based method: the more points a message receives, the higher the probability that it is spam.
Local configuration of SpamAssassin¶
To apply a local configuration of SpamAssassin in your home directory, create a folder called ".spamassassin" and inside it a configuration file: "user_prefs".
Examples¶
To use the examples below, place them in:
/usr/home/login/.spamassassin/user_prefs
Lowering the required score to 4 for a message to be considered spam:
required_score 4
Example SpamAssassin rules¶
Whitelist¶
The whitelist contains addresses that will never be marked as spam. The list may include single addresses [email protected] as well as all addresses for a domain *@domain.com.
Examples:
whitelist_from [email protected]
whitelist_from *@domain.com
Blacklist¶
The blacklist contains addresses that will always be rejected by the anti-spam system.
The list may include single addresses [email protected],
all addresses for a domain *@domain.com, or all subdomains
*.domain.com.
Examples:
blacklist_from [email protected]
blacklist_from *@domain.com
blacklist_from *.domain.com
URL filtering¶
Filtering URLs in the content of a message. The following example blocks
advertising content from URL: www.domain.com/ads/.
A message containing this URL will receive an additional 5 points
in spam classification.
uri LOCAL_URI_EXAMPLE /www\.domain\.com\/ads\//
score LOCAL_URI_EXAMPLE 5
Message body filtering¶
A rule that searches the content of a message for the string "test". In this example, a message containing the word "test" will receive an additional 3 points in spam classification.
body LOCAL_DEMONSTRATION_RULE /test/
score LOCAL_DEMONSTRATION_RULE 3
describe LOCAL_DEMONSTRATION_RULE Test rule