blocking Emails using ip address or domain name

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Hi,

We are getting lot of porn Email from mailme.dk, kiwwi.cz domain =
address. I have NATed mail server. Is it possible to block all incoming =
mails from these domains.

Thanks



$ ping mailme.dk

Pinging mailme.dk [194.234.11.210] with 32 bytes of data:

Reply from 194.234.11.210: bytes=3D32 time=3D280ms TTL=3D39
Reply from 194.234.11.210: bytes=3D32 time=3D281ms TTL=3D39


$ ping www.kiwwi.cz

Pinging syst.globaltel.cz [217.66.160.2] with 32 bytes of data:

Reply from 217.66.160.2: bytes=3D32 time=3D131ms TTL=3D240
Reply from 217.66.160.2: bytes=3D32 time=3D130ms TTL=3D240

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4807.2300" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3DArial size=3D2>Hi,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>We are&nbsp;getting lot of porn Email =
from=20
mailme.dk, kiwwi.cz domain address. I have NATed mail server. Is it =
possible to=20
block all incoming mails from these domains.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Thanks</FONT></DIV>
<DIV><FONT face=3DArial color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#000000 size=3D2><A=20
href=3D"mailto:netfilter@lists.netfilter.org";>$ ping =
mailme.dk</A></FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#000000 size=3D2>Pinging mailme.dk =
[194.234.11.210]=20
with 32 bytes of data:</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#000000 size=3D2>Reply from =
194.234.11.210: bytes=3D32=20
time=3D280ms TTL=3D39<BR>Reply from 194.234.11.210: bytes=3D32 =
time=3D281ms=20
TTL=3D39</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>$ ping <A=20
href=3D"http://www.kiwwi.cz";>www.kiwwi.cz</A></FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Pinging syst.globaltel.cz =
[217.66.160.2] with 32=20
bytes of data:</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Reply from 217.66.160.2: bytes=3D32 =
time=3D131ms=20
TTL=3D240<BR>Reply from 217.66.160.2: bytes=3D32 time=3D130ms=20
TTL=3D240</FONT></DIV></FONT></DIV></BODY></HTML>

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