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SpamAssassin Tags Inserted into E-Mail Messages

The following two sections detail the tagging that takes place for spam and non-spam messages.

Tags inserted for messages identified as spam:
Subject: header
The string [spam: xx.xx/yy.yy] is prepended to the subject, unless the rewrite_subject 0 configuration option is given.

X-Spam-Status: header
A string, Yes, hits=nn required=nn is set in this header to reflect the filter status.

X-Spam-Flag: header
Set to YES.

X-Spam-Report: header for spam mails
The SpamAssassin report is added to the mail header if the report_header 1 configuration option is given.

Content-Type: header
Set to text/plain, in order to defang HTML mail or other active content that could ``call back'' to the spammer.

spam mail body text
The SpamAssassin report is added to top of the mail message body, unless the report_header 1 configuration option is given.

Tags inserted for messages not identified as spam:

X-Spam-Status: header
A string, No, hits=nn required=nn is set in this header to reflect the filter status.