Email filter

Email exempt list

 

 

Uploading an email block list

You can create a email block list in a text editor and then upload the text file to the FortiGate unit. Add one pattern to each line of the text file. You can follow the pattern with a space and then a 1 to enable or a zero (0) to disable the pattern. If you do not add this information to the text file, the FortiGate unit automatically enables all patterns that are followed with a 1 or no number when you upload the text file.

Figure 43: Example email block list text file

mail.badsite.com 1 suredeal.org 1 user1@badsite.com 1

You can either create the email block list yourself, or add a block list created by a third-party email blacklist service. For example, you can subscribe to the Realtime Blackhole List service available at http://mail-abuse.org/rbl/ as a starting point for creating your own email block list. You can upload blacklists to the FortiGate unit as text files, with only minimal editing to remove comments at the top of each list and to combine the lists that you want into a single file.

Note: All changes made to the email block list using the web-based manager are lost when you upload a new list. However, you can download your current email block list, add more patterns to it using a text editor, and then upload the edited list to the FortiGate unit.

To upload the email block list

1In a text editor, create the list of patterns to block.

2Using the web-based manager, go to Email Filter > Block List.

3Select Upload.

4Type the path and filename of your email block list text file, or select Browse and locate the file.

5Select OK to upload the file to the FortiGate unit.

6Select Return to display the updated email block list.

7You can continue to maintain the email block list by making changes to the text file and uploading it again.

Email exempt list

Add address patterns to the exempt list to allow legitimate IMAP and POP3 traffic that might otherwise be tagged by email or content blocking. For example, if the email banned word list is set to block email that contains pornography-related words and a reputable company sends email that contains these words, the FortiGate unit would normally add a subject tag to the email. Adding the domain name of the reputable company to the exempt list allows IMAP and POP3 traffic from the company to bypass email and content blocking.

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