SonicWALL 5.8.1 Manuale Utente

You can add additional RBL services in the Real-time Black List Services section.

To add an RBL service, click the Add button. In the Add RBL Domain window, you specify the 
RBL domain to be queried, enable it for use, and specify its expected response codes. Most 
RBL services list the responses they provide on their Web site, although selecting Block All 
Responses is generally acceptable.

Statistics are maintained for each RBL Service in the RBL Service table, and can be viewed 
with a mouseover of the (statistics) icon to the right on the service entry.

The User Defined SMTP Server Lists section allows for Address Objects to be used to 
construct a white-list (explicit allow) or black-list (explicit deny) of SMTP servers. Entries in this 
list will bypass the RBL querying procedure. For example, to ensure that you always receive 
SMTP connections from a partner site's SMTP server, create an Address Object for the server 
using the Add button, click the edit icon in the Configure column of the RBL User White List 
row, and add the Address Object. The table will be updated, and that server will always be 
allowed to make SMTP exchanges.

The System > Diagnostics page also provides a Real-time Black List Lookup feature that 
allows for SMTP IP addresses (or RBL services, or DNS servers) to be specifically tested.

For a list of known spam sources to use in testing, refer to: