Cloud Edge uses Email Reputation (ER) technology to maximize
protection. ER technology allows Cloud Edge to determine
spam based on the reputation of the originating Mail Transfer Agent (MTA). With ER
enabled,
all inbound SMTP traffic is checked by the IP databases to see whether the originating
IP
address is clean or it has been blocked as a known spam vector.
 |
NoteFor Email Reputation Services to function properly, all address translation on inbound
SMTP traffic must occur after traffic passes through the Cloud Edge. If NAT or PAT takes place before the inbound
SMTP traffic reaches the Cloud Edge, Cloud Edge will always see the local address as the
originating MTA. ERS only blocks connections from suspect MTA public IP addresses,
not
private or local addresses. Therefore, customers using Email Reputation Services should
not translate inbound SMTP connections before they are scanned by Cloud Edge.
|
-
ERS Standard service is a database that tracks the reputation of about two billion IP addresses. IP addresses that have been consistently associated with the delivery of spam messages are added to the database and rarely removed.
-
ERS Advanced service is a DNS, query-based service similar to ERS Standard. At the core of this service is the standard reputation database, along with the dynamic reputation, real-time database. This service stops sources of spam while they are in the process of sending millions of messages.
When an IP address is found in either database, ERS “marks” the connection, and the
Cloud Edge behaves according to your chosen
configuration.