Email filter Adding address patt erns to the email block list
FortiGate-100 Installation and Configuration Guide 247
Email block list
You can configure the FortiGate unit to tag all IMAP and POP3 protocol traffic sent
from unwanted email addresses. When the FortiGate unit detects an email sent from
an unwanted address pattern, the FortiGate unit adds a tag to the subject line of the
email and writes a message to the email filter log. Receivers can then use their mail
client software to filter messages based on the subject tag.
You can tag email from a specific sender address or from all address subdomains by
adding the top-level domain name. Alternatively, you can tag email sent from
individual subdomains by including the subdomain to block.

Adding address patterns to the email block list

1Go to Email Filter > Block List.
2Select New to add an address pattern to the Email Block list.
3Type a Block Pattern.
• To tag email from a specific email address, type the email address. For example,
sender@abccompany.com.
• To tag email from a specific domain, type the domain name. For example,
abccompany.com.
• To tag email from a specific subdomain, type the subdomain name. For example,
mail.abccompany.com.
• To tag email from an entire organization category, type the top-level domain name.
For example, type com to tag email sent from all organizations that use .com as the
top-level domain.
The pattern can contain numbers (0-9), uppercase and lowercase letters (A-Z, a-z),
and the special characters - (hyphen),_ (underscore), and @. Spaces and other
special characters are not allowed.
4Select Enable to tag the email if part or all of the email address match the block
pattern.
5Select OK to add the address pattern to the Email Block list.
You can enter multiple address patterns and then select Check All to enable all
patterns in the Email Block list.
You can also enable any pattern in the Email Block list by checking the box in the
Enable column.
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.