MailEnable has two types of filters; global message filters and mailbox message filters.
1. Global message filters are processed by the MTA and apply to all sent and received mail passing through the mail server. The Bayesian filter and Antivirus filter are two examples of global message filters. Global message filters are configurable by Administrators under the MailEnable Messaging Manager.
2. Mailbox message filters (Enterprise Edition only) are processed by the post office connector service and apply to a message as it is being delivered to a mailbox. These filters have a more limited selection of criteria and actions that can be applied. Mailbox filters can be configured in the administration program, or users can configure their own mailbox filters via web mail.
Activity Log
Specify the status and location of the activity log file generated by the filter. This log file contains details of the filters that have been executed and their respective status.
Scratch Directory
The Scratch directory is used by the filters to unpack messages for analysis. This occurs when messages are scanned by the integrated Antivirus agents (this process is explained in more detail later in this section). This is the directory to where MailEnable will decode the email attachments while scanning. Make sure this directory is not subject to real-time scanning by any resident antivirus application.