Sender Filtering Service Parent topic

The Sender Filtering service has three individual components: Email Reputation, IP Profiler and SMTP Traffic Throttling.
  • Email Reputation filters connections from spam senders when establishing SMTP sessions.
  • IP Profiler helps protect the mail server from attacks with smart profiles from the Intrusion Detection Service (IDS).
  • SMTP Traffic Throttling blocks messages from a single IP address or sender for a certain time when the number of connections or messages reaches the specified maximum.
Tip
Tip
Trend Micro recommends deploying Sender Filtering as the first line of defense in your messaging infrastructure.
Although most email systems have a multi-layer structure that often includes some pre-existing IP blocking, spam filtering, and virus filtering, Trend Micro recommends completely removing other IP blocking techniques from the messaging environment. Sender Filtering should act as the precursor to any application filtering you might use.
Note
Note
Sender Filtering is only available from IPv4 networks. Incoming email messages from IPv6 networks are not blocked by Email Reputation, IP Profiler or SMTP Traffic Throttling.
When email traffic is extremely large, SMTP Traffic Throttling might not precisely block email messages as configured due to the time delay between rule trigger and activation.