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Spam Checking: Difference between revisions

Interaction between Spam checking and Sieve filtering
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(Interaction between Spam checking and Sieve filtering)
 
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*Rspamd.
 
Both of these will assign a 'spam score' to the message. We will then use the highesthigher score to classify a message as spam or not.
 
===Spam score options===
Once a message has been processed by the spam engines the message will then be subject to one of three options:
* Non-spam - accept
* Medium-scoring Spam - accept, but marked with ****SPAM :<score>**** to the subject, and saved to the spam folder (unless the mailbox is using Sieve filtering)
* High=scoring spam - rejected if possible, otherwise handled as per medium-scoring Spam
 
The score at which a messages is marked as spam or rejected can be set on the Control Pages on a per-Mailbox or per-Domain basis. The default score to mark as spam is 5, and to reject is 20.
 
===Headers===
We do add various extra headers to email regarding the Spamassassin and Rspamd scores and reports.
 
Here are some examples:
 
{| class="wikitable"
|-
! Header
! Information
! example
|-
| X-Spam-Score
| The spam score
| 2.1
|-
| X-AA-Spam-Rspamd-Score
| The spam score from Rspamd
| 2.1
|-
| X-AA-Spamassassin-Score
| The spam score from Spamassassin
| 2.0
|-
| X-AA-Spam-Engine-Used
| Which spam checking engine we used to classify this message
| Rspamd or Spamassassin
|-
| X-Spam-Score-Int
| The spam score multiplied by ten, as an integer value
| 21
|-
| X-Spam-Bar
| The spam score represented by +'s. One for each point. Negative scores represented by -'s. Very small scores by /.
| ++
|-
| X-Spam-Flag
| Whether the message is classed as spam or not
| YES or NO
|-
| X-Spam-Report
| The list of rules that were used that made up the spam score
|
|-
| X-Spam-Report-Secondary
| The list of rules from the other spam checker we use
|
|}
 
 
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