IBM AH0QXML - Lotus Domino Messaging, User Manual

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Lotus Domino 6 spam Survival Guide for IBM eServer
3.1 The Domino messaging environment
While every Domino installation is different, and many do use a single Domino
server to handle all tasks related to e-mail, a division of tasks between multiple
servers is typical of most larger environments. Generally, there are a number of
Domino servers on an internal network that users connect to in order to access
their mail, and one or more external Domino servers that are responsible for
connections to the Internet for inbound and outbound SMTP e-mail.
Some of the anti-spam features in Domino 6 must always be implemented on the
external Domino servers that handle the actual SMTP connections, some must
always be implemented on the internal servers, and some of the anti-spam
features can be implemented on either the external or internal servers—or even
on additional dedicated servers that are located “in between” the external servers
and the internal servers in the network topology.
The features that must be implemented on the external servers are:
򐂰 DNS blacklist filtering
򐂰 Inbound relay control and enforcement
򐂰 Inbound intended recipient controls
򐂰 Inbound connection controls
The features that must be implemented on the internal servers are:
򐂰
User mail file rules
The features that may be implemented on either internal, external or other
dedicated servers are:
򐂰 Inbound sender controls
򐂰 Disabled SMTP routing to groups
򐂰 Server mail rules
Figure 3-1 shows one such typical Domino network. A network such as the one
depicted here is an ideal configuration for establishing control of spam via the
Domino 6 anti-spam measures described in this redbook.
The implemented strategy to fight spam in the example Domino environment is to
stop spam at the Domino server.