Add Trusted Email Forwarders to Improve Spam Score Accuracy

Trusted Email Forwarders are not supported in Fireware v12.5.4 and higher or Fireware v12.1.4 to Fireware v12.4.x.

Part of the spam score for an email message is calculated from the IP address of the server that sent the message. If an email forwarding service sends the email, then the IP address of the forwarding server is used to calculate the spam score. Because the forwarding server is not the initial source email server, the spam score can be inaccurate.

Diagram that shows a trusted email forwarder

To improve spam scoring accuracy, you can specify one or more host names or domain names of email servers that you trust to forward email to your email server. If you use SMTP, specify one or more host names or domain names for SMTP email servers that you trust to forward messages to your email server. If you use POP3, specify domain names for known or commonly used POP3 providers that you trust to download messages from.

After you add one or more trusted email forwarders, spamBlocker ignores the trusted email forwarder in email message headers. The spam score is calculated using the IP address of the source email server.

To add a trusted email forwarder, from Fireware Web UI:

  1. Select Subscription Services > spamBlocker.
  2. Click Settings.
    The spamBlocker Settings page opens.
  3. Select the Settings tab.
  4. Below the Trusted Email Forwarders list, type a host or domain name in the text box. Click Add.
    If you add a domain name, make sure you add a leading period (.) to the name, for example .firebox.net.
  5. (Optional) Repeat Step 4 to add more trusted email forwarders.
  6. Click Save.

To add a trusted email forwarder, from Policy Manager:

  1. Select Subscription Services > spamBlocker > Configure.
  2. Click Settings.
    The spamBlocker Settings dialog box opens.
  3. Select the Trusted Email Forwarders tab.
  4. Type a host or domain name in the text box at the bottom of the dialog box. Click Add.
    If you add a domain name, make sure you add a leading period (.) to the name, for example .firebox.net.
  5. (Optional) Repeat step 4 to add more trusted email forwarders.
  6. Click OK.

See Also

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