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<p class="MsoNormal">We use an external mail host that relays all of our email to us on domain abc.domain.com. So all email on this domain comes from 1 subnet.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We also have another domain xyz.domain.com which I need to receive email from anywhere for.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In order to tighten things up a bit, I want to reject all mail destined to abc.domain.com that is NOT from the subnet of our external mail relay. Is this possible? Can someone point me in the right direction?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is how I picture this:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Reject all mail to abc.domain.com<o:p></o:p></p>
<p class="MsoNormal">Allow mail from 123.123.123.0/24 to abc.domain.com<o:p></o:p></p>
<p class="MsoNormal">Allow mail from anywhere to xyz.domain.com<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for any insight.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><img width="193" height="61" style="width:2.0104in;height:.6354in" id="_x0000_i1026" src="http://snj.ca/images/email-logo.png" alt="Smith Neufeld Jodoin LLP"></span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal">Sent by Quintin Giesbrecht <i><span style="color:lightgrey">IT Manager</span></i><br>
85 PTH 12 North - <b>Steinbach</b>, Manitoba R5G 1A7<br>
Tel: 204-326-3442 . Dir: (204)346-5106 . Fax: 204-326-2154<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<span style="color: gray; font-family: Calibri; font-size: small;">This communication, including its attachments, if any, is confidential and intended only for the person(s) to whom it is addressed, and may contain proprietary and/or privileged material. Any
unauthorized review, disclosure, copying, other distribution of this communication or taking of any action in reliance on its contents is strictly prohibited. If you have received this message in error, please notify SNJ immediately so that we may amend our
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