Connectivity
Made Easy
Page 83 of 164
Figure 5-3 SMTP Settings
Figure 5-4 shows the interface for configuring the thresholds and checks
performed on SMTP traffic.
Figure 5-4 SMTP Traffic Filters
The fields are described as follows:
1.
Verify domain name of sender’s email address – When enabled,
the InnGate will ensure that the sender’s email address contains a valid
domain name before sending the email. Spam is often sent using fake
email addresses.
2.
Limit the total number of concurrent SMTP connections – This
setting limits the total number of concurrent SMTP connections from all
downstream clients. Software or viruses that spam usually send out
high volumes of email concurrently, causing heavy bandwidth
utilization and putting a strain on the resources of the InnGate.
3.
Limit the users’ concurrent SMTP connections – When enabled
the InnGate will allow the specified number of concurrent SMTP
connections per downstream client. This limits the effectiveness of
malicious software which often attempt to send out high volumes of
email through multiple concurrent SMTP connections.