Configuring Anti-Spam Settings Parent topic

Configure Deep Edge anti-spam settings to:
  • Use Email Reputation Services to determine spam based on the reputation of the originating MTA. With ERS enabled, all inbound SMTP and POP3 traffic is checked by the IP databases to see whether the originating IP address is clean or it has been blacklisted as a known spam vector.
  • Take default intelligent actions on spam or customize the actions setting for the organization
  • Create approved and blocked senders lists
  • Set the spam "sensitivity" level or catch rate
  • Define the tag used in the subject line of a spam email message

Procedure

  1. Go to Policies → Security Settings → Anti-Spam → Anti-Spam tab.
  2. Select Enable email reputation to enable ERS.
    See Email Reputation Technology
  3. Select the actions to take on detected spam email messages:
    1. Leave the Default intelligent action radio button selected for the following actions to be in affect:
      • Permanent denial of connection (550) for RBL+ matches
      • Temporary denial of connection (450) for Zombie matches
      Note
      Note
      When using the default intelligent action, spam messages are rejected at the MTA with a brief message.
    1. Click the Take customized action on all matches radio button to set the actions needed on spam email messages such as:
      • SMTP error code: Set a code between 400 to 599. The default error code is 450
      • SMTP error string: "Service unavailable" is the default string.
  4. Under Approved Senders, specify an email address and then click Add to approve the sender.
  5. Under Blocked Senders, specify an email address and then click Add to block the sender.
  6. Set the Anti-Spam Catch Rate (Sensitivity Level).
    • High: Catches more spam. Select a high catch rate if too much spam gets through to clients.
    • Medium: The standard setting (default)
    • Low: Catches less spam. Select a low catch rate if Deep Edge is tagging too many legitimate email messages as spam.
    Note
    Note
    If needed, adjust the anti-spam catch rate at a later time. If the threshold is too low, a high incidence of spam occurs. If the threshold is too high, a high incidence of false positives (legitimate messages that are identified as spam) occurs.
  7. Under Other Settings, change the subject line tag used to identify email messages detected as spam. The default is [Spam].
  8. Click OK to save the changes.