Configuring profiles : Configuring session profiles : Configuring sender reputation options
Configuring sender reputation options
This procedure is part of the session profile configuration process. For general procedures about how to configure a session profile, see “Configuring session profiles”.
You can also view the sender reputation statuses by going to Monitor > Sender Reputation. See “Viewing the sender reputation statuses”.
To configure sender reputation options
1. Go to Profile > Session.
2. Click New to create a new session profile or double click on an existing profile to edit it.
3. Click the arrow to expand Sender Reputation.
Configure the sender reputation settings to restrict the number of email messages sent from SMTP clients based upon whether they have a reputation of sending an excessive number of email messages, email with invalid recipients, or email infected with viruses.
 
Sender reputation scores can be affected by sender validation results.
 
 
Enabling sender reputation can improve performance by rejecting known spammers before more resource-intensive antispam scans are performed.
4. Configure the following:
 
GUI item
Description
Enable sender reputation checking
Enable to accept or reject email based upon sender reputation scores.
The following options have no effect unless this option is enabled.
 
Throttle client at n
 
Enter a sender reputation score over which the FortiMail unit will rate limit the number of email messages that can be sent by this SMTP client.
Entering 0 means no score limit and thus no action. But FortiMail still monitors the sender reputation and increases or decreases the sender reputation scores accordingly.
The enforced rate limit is either Restrict number of emails per hour to n or Restrict email to n percent of the previous hour, whichever value is greater.
 
Restrict number of emails per hour to n
Enter the maximum number of email messages per hour that the FortiMail unit will accept from a throttled SMTP client.
 
Restrict email to n percent of the previous hour
Enter the maximum number of email messages per hour that the FortiMail unit will accept from a throttled SMTP client, as a percentage of the number of email messages that the SMTP client sent during the previous hour.
 
Temporarily fail client at n
 
Enter a sender reputation score over which the FortiMail unit will return a temporary failure error when the SMTP client attempts to initiate a connection.
Entering 0 means no score limit and thus no action. But FortiMail still monitors the sender reputation and increase or decrease the sender reputation scores accordingly.
 
Reject client at n
Enter a sender reputation score over which the FortiMail unit will reject the email and reply to the SMTP client with SMTP reply code 550 when the SMTP client attempts to initiate a connection.
Entering 0 means no score limit and thus no action. But FortiMail still monitors the sender reputation and increase or decrease the sender reputation scores accordingly.
Check FortiGuard Block IP at connection phase
Enable to query the FortiGuard Antispam Service to determine if the IP address of the SMTP server is blocklisted. And this action will happen during the connection phase.
In an antispam profile, you can also enable FortiGuard block IP checking. But that action happens after the entire message has been received by FortiMail.
Therefore, if this feature is enabled in a session profile and the action is reject, the performance will be improved.