The General Filter Settings are used to set the redirection address for messages that are rejected by the Attachment or Content filter.
General Filter Settings dialog box
In you would like to edit the General Filter Settings, click the Edit button.
When a message is rejected by the Content or Attachment filter you can specify a redirection address for the bounced message.
Filtered mail bounce address dialog box
Enter the full email address for the mailbox that you would like the reject mail to be redirected and then click Next to continue. For example postmaster@domain.com.
You will be asked to confirm the Bounce Address in the next dialog box by clicking the Apply button.