Enabling the Dynamic Always Permit List function allows some mail exchanged between a sender/recipient address pair to bypass antispam filtering. When mail between a sender to a
                recipient does not trigger an antispam filter a specified number of times, that sender/recipient address pair is added to the Dynamic Always Permit List. Antispam analysis is not
                performed on mail between this sender/recipient address pair. When a specified timeout period has elapsed, the address pair is removed from the list.
        
        
        
        Steps
- 
                From the section Dynamic Always Permit List on the Always Permit tab, mark the check box Enable Dynamic Always Permit List.
                Functionality is enabled by default. 
- 
                In the field Occurrence, enter the number of spam-free email exchanges (from 1 to 5) required before a sender/recipient pair is added to the list.
                The default is 1. 
- 
                In the field Timeout, enter a value for the timeout interval in hours (from 1 to 720).
                The default is 720. 
- 
                (Optional) Clear the list manually; click the button Clear Dynamic Always Permit List.
                If you disable this function, the list is automatically cleared.