spamBlocker is not filtering emails with the f-word plainly spelled in it. Is there anyway to tune it so it can?
No, there are no tuning options for this.
A hash of the e-mail is sent to Cyren for scoring.
There is this option:
Report False Positives or Missed Spamhttps://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Fireware/services/spamblocker/spam_report_false_c.html
You can block e-mails with selected words in the subject, but not in the body.
You do this in the SMTP proxy action - Headers field, normally using RegEX.
Here is an example:
Subject Contains "hot Chicks"
Regex = ^((?i)Subject):\s(?i).*hot chicks
Thanks for the good example. I created a Header Rule and hope it works!