Eliminate Spam Now... >g< Python w/DNS/&POP3

[Sheila King]

On Sun, 17 Mar 2002 21:56:15 GMT, Benjamin Schollnick
<junkster at rochester.rr.com> wrote in comp.lang.python in article
<junkster-2D9783.16561617032002 at typhoon4-3.nyroc.rr.com>:

> Folks,
> 
>    I'm running into a slight problem...
> 
>    I'm attempting to use the (py)DNSlib (sourceforge project), to look 
> up Spammers via ORBZ (or similiar group)...
> 
>    And I'm able to pull up the DNS information, but every entry I try 
> response with a valid root level DNS entry....  Can anyone enlighten me 
> regarding the operations of the black hole lists?  I can't seem to find 
> any of the sights that explain the actual functionality.
> 
>    (I've tried reversing the octets [i.e. 13.175.214.14 == 
> 14.214.175.13], with no luck)
> 
>             = Benjamin

This will do it for you. Note that I'm using the Spamcop black hole list,
but you can use any one you want:

import socket

def IP_in_bl(host, IPaddy):
    IPquads = IPaddy.split('.')
    IPquads.reverse()
    reverseIP = '.'.join(IPquads)

    IPlookup = "%s.%s" % (reverseIP, host)
    try:
        resolvesIP = socket.gethostbyname(IPlookup)
        if resolvesIP.startswith('127.'):
            return 1
    except socket.gaierror:
        return 0

###############################
#
#  begin main test program
#
###############################

IPaddy = '211.192.182.125'
host = 'bl.spamcop.net'

if IP_in_bl(host, IPaddy):
    print "OPEN RELAY!!!"
else:
    print "not a known Open Relay."



--
Sheila King
http://www.thinkspot.net/sheila/
http://www.k12groups.org/