Concepts and workflow : How FortiMail processes email : Antispam techniques : FortiMail antispam techniques
FortiMail antispam techniques
The following table highlights some of the FortiMail antispam techniques. For information about how these techniques are executed, see “Order of execution”.
Table 1: FortiMail antispam technique highlights
Greylist scanning
See “Configuring greylisting”.
DNSBL scanning
In addition to supporting Fortinet’s FortiGuard Antispam DNSBL service, the FortiMail unit supports third-party DNS Blocklist servers. See “Configuring SURBL options”.
SURBL scanning
In addition to supporting Fortinet’s FortiGuard Antispam SURBL service, the FortiMail unit supports third-party Spam URI Realtime Block Lists servers. See “Configuring SURBL options”.
Bayesian scanning
See “Training the Bayesian databases”.
Heuristic scanning
See “Configuring heuristic options”.
Image spam scanning
See “Configuring image spam options”.
PDF scanning
See “Configuring scan conditions”.
Block/safe lists
• For information on global block/safe lists, see “Configuring the global block and safe list”.
• For information on domain-wide block/safe lists, see “Configuring the per-domain block lists and safe lists”.
• For information on personal block/safe lists, see “Configuring the personal block lists and safe lists”.
• For information on session block/safe lists, see “Click the arrow to expand Lists.”.
Banned word scanning
See “Configuring banned word options”.
Safe list word scanning
See “Configuring safelist word options”.
Sender reputation
See “Viewing the sender reputation statuses”.