Cisco Cisco Email Security Appliance C190 Guía Del Usuario
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Cisco AsyncOS 9.0 for Email User Guide
Chapter 9 Using Message Filters to Enforce Email Policies
Message Filter Rules
Receiving Listener Rule
The
recv-listener
rule selects those messages received on the named listener. The listener name must
be the nickname of one of the listeners currently configured on the system. For example, the following
filter immediately delivers any message arriving from the listener named
filter immediately delivers any message arriving from the listener named
expedite
.
Receiving IP Interface Rule
The
recv-int
rule selects those messages received via the named interface. The interface name must be
the nickname of one of the interfaces currently configured for the system. For example, the following
filter bounces any message arriving from the interface named
filter bounces any message arriving from the interface named
outside
.
Date Rule
The
date
rule checks the current time and date against a time and date you specify. The date rule is
compares against a string containing a timestamp of the format
MM/DD/YYYY hh:mm:ss. This is useful to specify actions to be performed before or after certain times
in US format. (Note that there may be an issue if you are searching messages with non-US date formats.)
the following filter bounces all messages from
MM/DD/YYYY hh:mm:ss. This is useful to specify actions to be performed before or after certain times
in US format. (Note that there may be an issue if you are searching messages with non-US date formats.)
the following filter bounces all messages from
campaign1@yourdomain.com
that are injected after
1:00pm on July 28th, 2003:
{
bounce();
}
expediteFilter:
if (recv-listener == 'expedite')
{
skip-filters();
}
outsideFilter:
if (recv-int == 'outside')
{
bounce();
}
TimeOutFilter:
if ((date > '07/28/2003 13:00:00') and (mail-from ==
'campaign1@yourdomain\\.com'))