Modifying Anti-Spam Settings Parent topic

The default anti-spam profile action can be modified to use the default intelligent action or to specify an SMTP error code, add or delete from the approved and blocked lists, change the catch rate setting or the tag used in the spam email messages subject line.

Procedure

  1. Go to Policies → Security Settings → Anti-Spam.
  2. To change the mail content scanning action, select the appropriate radio button:
    • Default intelligent action—Permanent denial of connection (SMTP Error Code 550) for RBL+ matches and temporary denial of connection (SMTP Error Code 450) for Zombie matches. An RBL+ match is a higher degree of confidence that the sender is a known spammer. A Zombie match is when Trend Micro thinks that a previously good sender has gone bad due to a botnet infection. For this reason, the temporary denial of connection code (450) is sent.
    • Take customized action of all matches—If this is selected, specify the SMTP error code and message to be viewed when violations of this profile occur.
  3. Add or remove entries from the approved and blocked users lists. To delete an entry, select it and click Remove.
    • Select an entry and click Remove to delete it.
    • Click Remove All to remove all entries in the list.
  4. Change the Anti-Spam Catch Rate (Sensitivity Level).
    • High
    • Medium: (default)
    • Low
    Note
    Note
    The anti-spam catch rate can be adjusted after configuring the anti-spam settings. 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.
  5. Under Other Settings, change the subject line tag used to identify email messages detected as spam. The default is Spam.
  6. Click OK.