======Spam Filter Rules: DNS======
^Statement  |DNS |
^Version  |2.1.11+ |
^Purpose  |Allows the script to perform an arbitrary DNS lookup, returning the result into a specified variable |

The **DNS** statement requires a type, hostname and variable name, in the format
  DNS <type> <hostname> <variable name>

 
The result variable will contain a list of the results found (more than one result may be found for any particular DNS query), in the form:
  <hostname>":"<type>":"<result>

Each result will be separated from the next by a linefeed character ("\n")

**See also**
  * [[spamrules_statement_startdns|StartDNS]] - Can be used in advance of **DNS** being called, to improve script efficiency

=====Examples=====
The following example will look up the MX records for the hostname specified in the ${Domain} variable, and put the result into the ${dnsresult} variable
<code>
DNS MX ${Domain} dnsresult
</code>

Returned data
<code>
DNS MX pscs.co.uk dnsresult

# A plausible value for ${dnsresult} is included on the next line
# pscs.co.uk:mx:smtp2.redcondor.com\n pscs.co.uk:mx:spoolers.redcondor.com\n pscs.co.uk:ns:ns0.pscs.com\n pscs.co.uk:ns:ns0.pscs.co.uk
</code>