this sets the email address or mailbox to which to forward SPAM if the Forward action is checked
detectedspam@example.com
Types
You can optionally forward blocked and/or deleted spam to a designated address.
Marked+Blocked+Deleted
Blocked
Subject Mark
this sets the text used to prefix the subject line of the email if it is considered as SPAM. You can use the token <reason> to insert the reason the email was marked as SPAM into the subject at the location of the token