Руководство Пользователя для Cisco Cisco Email Security Appliance C190
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Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide
OL-25137-01
Chapter 6 Using Message Filters to Enforce Email Policies
The
bcc
action also supports up to three additional, optional arguments that allow you to specify the
subject header and Envelope Sender to use on the copied message, as well as an alt-mailhost. These
parameters must appear in order, so a subject must be provided if the Envelope Sender is to be set.
parameters must appear in order, so a subject must be provided if the Envelope Sender is to be set.
The subject parameter may contain action variables (see
) that will be
replaced with data from the original message. By default, this is set to the subject of the original message
(the equivalent of
(the equivalent of
$Subject
).
The Envelope Sender parameter may be any valid email address, or alternatively, may be the action
variable
variable
$EnvelopeFrom
, which will set the return path of the message to the same as the original
message.
This example expands the previous one by setting the subject to be
[Bcc] <original subject>
, and the
return path set to
badbounce@home.org
:
The alt-mailhost is the fourth parameter:
Warning
The
Bcc()
,
notify()
, and
bounce()
filter actions can allow viruses through your network. The blind
carbon copy filter action creates a new message which is a full copy of the original message. The
notify filter action creates a new message that contains the headers of the original message. While
it is rare, headers can contain viruses. The bounce filter action creates a new message which
contains the first 10k of the original message. In all three cases, the new message will not be
processed by anti-virus or anti-spam scanning.
notify filter action creates a new message that contains the headers of the original message. While
it is rare, headers can contain viruses. The bounce filter action creates a new message which
contains the first 10k of the original message. In all three cases, the new message will not be
processed by anti-virus or anti-spam scanning.
{
bcc('mom@home.org');
}
momFilter:
if ((mail-from == '^johnny$') and (rcpt-to == '^sue$'))
{
bcc('mom@home.org', '[Bcc] $Subject', 'badbounce@home.org');
}
momFilterAltM:
if ((mail-from == '^johnny$') and (rcpt-to == '^sue$'))
{
bcc('mom@home.org', '[Bcc] $Subject', '$EnvelopeFrom',
'momaltmailserver.example.com');
}