NAME
    DNSEVAL - look up URLs against DNS blocklists

SYNOPSIS
     loadplugin Mail::SpamAssassin::Plugin::DNSEval

     rbl_headers EnvelopeFrom,Reply-To,Disposition-Notification-To
     header     RBL_IP    eval:check_rbl_headers('rbl', 'rbl.example.com.', '127.0.0.2')
     describe   RBL_IP    From address associated with spam domains
     tflags     RBL_IP    net
     reuse      RBL_IP

     Supported extra tflags from SpamAssassin 3.4.3:
      domains_only - only non-IP-address "host" components are queried
      ips_only - only IP addresses as the "host" component will be queried

DESCRIPTION
    The DNSEval plugin queries dns to see if a domain or an ip address
    present on one of email's headers is on a particular rbl.

USER PREFERENCES
    The following options can be used in both site-wide ("local.cf") and
    user-specific ("user_prefs") configuration files to customize how
    SpamAssassin handles incoming email messages.

    rbl_headers
         This option tells SpamAssassin in which headers to check for content
         used to query the specified rbl.
         If on the headers content there is an email address, an ip address
         or a domain name, it will be checked on the specified rbl.
         The configuration option can be overridden by passing an headers list as
         last parameter to check_rbl_headers.
         The default headers checked are:

    *   EnvelopeFrom

    *   Reply-To

    *   Disposition-Notification-To

    *   X-WebmailclientIP

    *   X-Source-IP

    check_rbl_from_domain
        This checks all the from addrs domain names as an alternate to
        check_rbl_from_host. As of v3.4.1, it has been improved to include a
        subtest for a specific octet.

    check_rbl_ns_from
        This checks the dns server of the from addrs domain name. It is
        possible to include a subtest for a specific octet.

    check_rbl_rcvd
        This checks all received headers domains or ip addresses against a
        specific rbl. It is possible to include a subtest for a specific
        octet.