User Guide

Kaspersky Anti-Spam Operation and Filtering Philosophy 29
Several actions can be described in a single rule, but if any of these actions are
severe or moderately severe, then message processing by this rule (as well as
by all other rules of the current profile) stops and no further actions will be
performed.
Actions within the same rule are arranged in strict order.
Actions of the following types can be described in filtering rules:
• "Severe" actions:
• reject – refuse to accept this message on the SMTP-chat level.
The filtering server returns error 550 to the sending server while
receiving the message via the SMTP protocol. The text of the
error message can be set using WebConfigurator (see para
5.2.7, page 84).
The personal profile provides for the execution of a combination
of the bounce + black hole actions rather than the reject action
(as a personal profile can be used only for a part of the
recipients and a "partial" rejection is impossible).
• black hole – delete the message (do not pass it further) without
generating a message to the sender.
Rules containing this type of actions should be
applied with care because the message will be
completely deleted and cannot be restored.
Message delivery is blocked for all users in the common profile
while for blocking message delivery to users this personal profile is
applied to a personal profile is used.
• accept – forward message to the recipient (recipients) without
modifying it, i.e. as it appears after the prior processing. When
such action is executed, the message is passed further without
any delay and no other filtering rules will be applied to it. The
rules with the accept action are used to support the use of the
white lists.
In addition, the accept action is executed by default at the end of
processing of any message (or a message copy), provided that no
reject or black hole actions has been executed:
o at the end of the private profile for all recipients of this
private profile;
o after execution of all private profiles for all recipients who
have not been processed.