Cisco Cisco Email Security Appliance C680 User Guide

Submit and commit your changes. 

(Optional) Send to Alternate 
Host

You can send identified messages to an alternate destination mailhost 
(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). 

Use this option if you want to redirect messages, for example to a 
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.

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 

[SPAM]

 with a few trailing spaces. 

“Add Text to Subject” field only accepts US-ASCII 
characters.

Advanced Options (for custom header and message delivery) 

(Optional) Add Custom 
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 

(Optional) Send to an Alternate 
Envelope Recipient

You can have identified messages sent to an alternate envelope 
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.

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.