Fortinet FortiGate-800 - Manual (Page 287)

Antivirus protection Exempting fragmented email from blocking
FortiGate-800 Installation and Configuration Guide
287
Exempting fragmented email from blocking
A fragmented email is a large email message that has been split into smaller
messages that are sent individually and recombined when they are received. By
default, when antivirus protection is enabled, the FortiGate unit blocks fragmented
emails and replaces them with an email block message that is forwarded to the
receiver. It is recommended that you disable the fragmenting of email messages in the
client email software.
To exempt fragmented emails from automatic antivirus blocking
1 Enable Pass Fragmented Emails for IMAP, POP3, and SMTP traffic in a content
profile.
2 Select Anti-Virus & Web filter in a firewall policy. For example, to pass fragmented
emails that internal users send to the external network, select an internal to external
policy.
3 Select a content profile that has Pass Fragmented Emails enabled for the traffic that
you want the FortiGate unit to scan.
Viewing the virus list
You can view the names of the viruses and worms in the current virus definition list.
To view the virus list
1 Go to Anti-Virus > Config > Virus List.
2 Scroll through the virus and worm list to view the names of all viruses and worms in
the list.
! Caution: The FortiGate unit cannot scan fragmented emails for viruses or use file pattern
blocking to remove files from these email messages.