Chapter 15 Security Profiles : Email filter : Configuring an Email Filters : Spam detection by protocol : Spam Action
  
Spam Action
For the client protocols, IMAP and POP3 the options are:
Tag - This action will insert a tag into the email somewhere so that when the recipients view the email they will be warned that it is likely a spam.
Pass - This action will allowany emails marked as spam to pass through without change. If this option is chosen, the Tag comments will be greyed out.
For the tranfer protocol, SMTP, the options are:
Tag - This action will insert a tag into the email somewhere so that when the recipients view the email they will be warned that it is likely a spam.
Discard - The action will drop the email before it reaches its destination.
Pass - This action will allowany emails marked as spam to pass through without change. If this option is chosen, the Tag comments will be greyed out.