Blacklisting is the name given to a list of email addresses from which you specifically do not want to receive messages.

Each blacklist entry can be either a complete email address or a partial email address with Pattern matching characters.

The action taken when detecting a blacklisted address depends on whether the filter is being applied at the SMTP or domain level.

  • SMTP
    The senders address and entire message will be rejected. Any bounce operations are handled by the sending server.

  • Domain
    The filter policy specifies the action taken using the filter rules. See: Filter Rules

See: Filter Blacklist,