User manual

A V G Email Server Edition 20 12 © 2012 C opyright A V G Technologies C Z, s.r.o. A ll rights reserved. 42
scanning process to identify spam, the following features will be used: rules and
spam database cache, basic and advanced rules, spammer IP addresses and
spammer databases.
The Enable on-line checking item is on by default. It results in more precise spam detection via
communication with the Mailshell servers, i.e. the scanned data will be compared with Mailshell
databases online.
Generally it is recommended to keep the default settings and only change them if you have a
valid reason to do so. Any changes to this configuration should only be done by expert users!
7.5. RBL
The RBL item open an editing dialog called Realtime Blackhole Lists:
In this dialog you can switch on/off the Query RBL servers function.
The RBL (Realtime Blackhole List) server is a DNS server with an extensive database of known
spam senders. When this feature is switched on, all e-mail messages will be verified against the
RBL server database and marked as spam if identical to any of the database entries.
The RBL servers databases contain the latest up-to-the-minute spam fingerprints, to provide the very
best and most accurate spam detection. This feature is especially useful for users who receive large
amounts of spam that is not being normally detected by the Anti-Spam engine.