Cisco Cisco Email Security Appliance C160 用户指南

下载
页码 568
Chapter 6      Using Message Filters to Enforce Email Policies
6-132
Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
  •
The first filter is named 
big_messages
. It uses the 
body-size
 rule to drop 
messages larger than 10 megabytes. 
  •
The second filter is named 
no_mp3s
. It uses the 
attachment-filename
 rule to 
drop messages that contain attachments with the filename extension of 
.mp3
  •
The third filter is named 
mailfrompm
. It uses 
mail-from
 rule examines all 
mail from 
postmaster@example.com
 and blind-carbon copies 
administrator@example.com
Using the 
filter -> list
 subcommand, the filters are listed to confirm that they 
are active and valid, and then the first and last filters are switched in position using 
the 
move
 subcommand. Finally, the changes are committed so that the filters take 
effect. 
mail3.example.com> filters
Choose the operation you want to perform:
- NEW - Create a new filter.
- IMPORT - Import a filter script from a file.
[]> new
Enter filter script.  Enter '.' on its own line to end.
big_messages:
    if (body-size >= 10M) {
       drop();
    }
.
1 filters added.