Installation manual

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3.3.2.1.4.7 Ignored domains
This option allows you to specify body domains which should always be excluded from the DNSBL checks and
ignored.
3.3.2.1.4.8 Blocked domains
This option allows you to specify body domains and IP's which should should always be blocked.
3.3.2.1.4.9 Spoofed senders
Allows blocking spammers who spoof your domain name and other domain names. For example, spammers often
use the recipient's domain name as the From: domain name. This list allows you to specify which mail servers are
allowed to use which domain names in the From: address. The offset will be applied when mail from the domain
does not come from the specified IP range.
3.3.2.1.5 Verification
Verification is an additional feature of Antispam protection. It allows for messages being verified by the means of
external servers according to defined criteria. Choose a list from the setup tree to configure its criteria. The lists are
following:
RBL (Realtime Blackhole List)
LBL (Last Blackhole List)
DNSBL (DNS Blocklist)
3.3.2.1.5.1 RBL (Realtime Blackhole List)
RBL servers: - Specifies a list of Realtime Blackhole List (RBL) servers to query when analyzing messages. Please
refer to the RBL section in this document for further information.
RBL verification sensitivity: - Since RBL checks can introduce latency and a decrease in performance, this option
allows running RBLs check conditionally based on the score prior to RBL checks. If score is greater than the "high"
value then only those RBL servers which can bring score below "high" value are queried. If score is less than the
"low" value then only those RBL servers which can bring score above "low" value are queried. If score is between
"low" and "high" then all RBL servers are queried.
RBL request execution limit (in seconds): - This option allows setting a maximum timeout for finishing all RBL
queries. RBL responses are only used from those RBL servers which responded in time. If value is "0" then no
timeout is enforced.
Maximum number of verified addresses against RBL: - This option allows limiting how many IP addresses are
queried against the RBL server. Note that the total number of RBL queries will be the number of IP addresses in the
Received: headers (up to a maximum of RBL maxcheck IP addresses ) multiplied by the number of RBL servers
specified in RBL list. If the value is "0" then unlimited number of received headers are checked. Note that IP's which
match against the ignored IP list option do not count towards the RBL IP addresses limit.
To manage the list, use Add..., Edit... or Remove buttons.
The list consists of three columns:
Address
Response
Score