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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>How do you add these IPTables rules? I’m always a little cautious messing with IPTables cause I’ve blocked myself a few times </span><span style='font-size:11.0pt;font-family:Wingdings;color:#1F497D'>J</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><p class=MsoNormal><br>And then, to stop the scripts connecting via IP instead of using the MX records -- I put IPTables rules in our BX servers that only accept TCP port 25 connections from our internal networks and from the CanIt server. That completely eliminated the problem with connections bypassing the CanIt server. But it does require that every domain on that BX server have their mail going through the CanIt server (otherwise, the IPTables rules are a headache). <br><br><br><o:p></o:p></p></div></div></body></html>