IBM AH0QXML - Lotus Domino Messaging, Руководство пользователя

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Chapter 3. Domino 6 anti-spam architecture
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7. Originating SMTP server sends the DATA command to initiate the transfer of
the message contents.
8. Domino SMTP Listener acknowledges start of DATA.
9. Originating SMTP server sends END OF DATA to indicate data transfer is
complete. Domino SMTP Listener checks any inbound file size restrictions.
Server mail rules are run, but only “Don’t accept message” action is applied
here.
10.Domino SMTP acknowledges END OF DATA and awaits disconnect or next
message. (Note: Steps 3 through 10 are repeated for additional messages.)
11.Originating SMTP server sends QUIT, initiating close session sequence.
12.Domino SMTP acknowledges QUIT and closes connection.
The earlier in this sequence that you can detect and reject a spam message, the
fewer server resources are wasted by the spam.
3.2.2 Router
Once a message has been received by the SMTP Listener, it is analyzed against
the Server mail rules. The Server mail rules are evaluated against any incoming
message as it is placed into the server MAIL.BOX. Server Mail rules are your
second line of defense. Inbound controls can and should be used to block all mail
to or from specific users and domains. The Server mail rules allow more flexibility
and control by allowing you to specify additional conditions to be tested. You can
also specify additional actions to be taken on the message other than just
denying the delivery of it.
If a message passes all testing in the server rules, it is then processed by the
router for forwarding to another Domino server (which might have a different set
of rules), or for placement into an end-user mail file. The mail file rules are
typically established by the end-user of the mail file. Mail file rules are evaluated
for any incoming messages on the server, before delivering the message to the
user’s mail file. Every Domino installation is different, and your particular
circumstances will dictate where and how stringently you control incoming spam.
3.3 Domino 6 anti-spam configuration
The best defense against spam is knowing the options available to you as the
administrator. Being able to identify what messages are considered spam, versus
those that were unsolicited, will help in eliminating it. Spam comes in many
forms, from Web hoaxes, chain letters, and unsolicited sales and marketing
material for a product you’d never buy, to the most common, offensive adult-rated