Cisco Cisco Email Security Appliance C160 Guía Del Usuario
13-9
User Guide for AsyncOS 9.7 for Cisco Email Security Appliances
Chapter 13 Anti-Spam
Defining Anti-Spam Policies
Step 6
Submit and commit your changes.
(Optional) Send to Alternate
Host
Host
You can send identified messages to an alternate destination mailhost
(an email server other than the ones listed in SMTP Routes or DNS).
(an email server other than the ones listed in SMTP Routes or DNS).
Enter an IP address or hostname. If you enter a hostname, its Mail
Exchange (MX) will be queried first. If none exists, the A record on
the DNS server will be used (as with SMTP Routes).
Exchange (MX) will be queried first. If none exists, the A record on
the DNS server will be used (as with SMTP Routes).
Use this option if you want to redirect messages, for example to a
sandbox mail server for further examination.
sandbox mail server for further examination.
For additional important information, see
Add Text to Subject
You can alter text in the Subject of identified messages by prepending
or appending certain text strings to help users more easily identify and
sort spam and unwanted marketing messages.
or appending certain text strings to help users more easily identify and
sort spam and unwanted marketing messages.
Note
White space is not ignored in this field. Add spaces after (if
prepending) or before (if appending) the text you enter in this
field to separate your added text from the original subject of
the message. For example, if you are prepending, add the text
prepending) or before (if appending) the text you enter in this
field to separate your added text from the original subject of
the message. For example, if you are prepending, add the text
[SPAM]
with a few trailing spaces.
Note
“Add Text to Subject” field only accepts US-ASCII
characters.
characters.
Advanced Options (for custom header and message delivery)
(Optional) Add Custom
Header
Header
You can add a custom header to identified messages.
Click Advanced and define header and value.
You can use a custom header in conjunction with a content filter to
perform actions such as redirecting URLs in suspected spam
messages so that they pass through the Cisco Web Security proxy
service. For information, see
perform actions such as redirecting URLs in suspected spam
messages so that they pass through the Cisco Web Security proxy
service. For information, see
(Optional) Send to an Alternate
Envelope Recipient
Envelope Recipient
You can have identified messages sent to an alternate envelope
recipient address.
recipient address.
Click Advanced and define an alternate address.
For example, you could route messages identified as spam to an
administrator’s mailbox for subsequent examination. In the case of a
multi-recipient message, only a single copy is sent to the alternate
recipient.
administrator’s mailbox for subsequent examination. In the case of a
multi-recipient message, only a single copy is sent to the alternate
recipient.
Archive Message
Y
ou can archive identified messages into the “Anti-Spam Archive”
log. The format is an mbox-format log file.
Spam Thresholds
Use the default thresholds or enter a threshold value for positively
identified spam and a value for suspected spam.
identified spam and a value for suspected spam.
Option
Description