What To Do With Spam
Once a spam email has been identified, there are several actions that can occur based on administrator and/or user preferences:
Deliver to Spam folder.
This will allow each user to review the emails that have been tagged as spam. This folder can be viewed from webmail or IMAP, and settings are available to automatically delete old spam from this folder after a certain number of days or number of emails
Tag the subject.
The word "[SPAM]" will be added to the beginning of the subject line, and then delivered normally. This allows each user to set up custom filtering rules inside of desktop mail programs, such as Microsoft Outlook.
Forward to an alternate email address.
This is useful if a company wants to have a single administrator review all of the spam that their users receive.
Delete the email.
In this case, users will never see the spam.