manual

the DNSBL protocol and RBL servers to filter spam based on mail servers' reputation
as spam senders.
A DNS check is performed on the domain d.c.b.a.rbl.example.com, where
d.c.b.a is the reversed IP address of the server and rbl.example.com is the RBL
server. If the DNS replies that the domain is valid, it means that the IP is listed in the
RBL server and a certain server score is provided. This score ranges between 0 and
100, according to the configured server confidence (trust level).
The query is performed for every RBL server in the list and the score returned by each
one is added to the intermediate score. When the score has reached 100, no more
queries are performed.
If the RBL filter score is 100 or higher, the message is considered SPAM and the
specified action is taken. Otherwise, a spam score is computed from the RBL filter
score and added to the global spam score of the message.
Provide the IP or the address of the DNS server to query and the query timeout interval
in the corresponding fields.
Add RBL Servers. Click Add to add a new RBL server to the list. The configuration
window will appear.
Add RBL Servers
First, specify the name of the RBL server and then
the level of trust. The level of trust is an indicator
on a scale from 0 to 100 which shows the
accuracy you consider the RBL server to have.
The value you provide is used when computing
the SPAM score. Click OK to add the RBL server
to the list.
Manage RBL Servers. You can see the RBL servers listed in the table. If you want
to modify the settings for an RBL server, either double-click it or select it and click
Modify. To remove one or several selected RBL servers, click Remove and then Yes
to confirm your choice.
Import / Export RBL Servers. To export the existing RBL servers and their settings
to a txt file, click Export and save the file to the desired location. To import a
previously saved database of RBL servers click Import.
Click OK to save the changes and close the configuration window.
Antispam
158
BitDefender Security for Exchange