Hi Everyone,<br><br>So I installed Exchange server yesterday and though i had done it all.<br><br>then i get this error for specific domains only...<br><br>

<p class="MsoPlainText"><a href="mailto:priscilla.thesecretary@eaded.org">priscilla.thesecretary@eaded.org</a>
on Wed, 23 Mar 2011 15:25:07 +0300</p>

<p class="MsoPlainText"><span style="mso-spacerun:yes">    </span>There was a
SMTP communication problem with the recipient&#39;s email server.<span style="mso-spacerun:yes">  </span>Please contact your system administrator.</p>

<p class="MsoPlainText"><span style="mso-spacerun:yes">   
</span><b>&lt;<a href="http://mymajordomain.com">mymajordomain.com</a> #5.5.0 smtp;550-Verification failed for &lt;<a href="mailto:martin@mymajordomain.com">martin@mymajordomain.com</a>&gt;&gt;</b></p><p class="MsoPlainText">
So the basic set up is for smtp<br></p><p class="MsoPlainText">Client W/s (Outlook, Thunderbird, )<br></p><p class="MsoPlainText">Exchange Server (Domain - Mymajordomain.com {Smtp Record points to this servers ip address on my domain host on the net.})</p>
<p class="MsoPlainText">Recepients server (Most likely doing a reverse dns lookup)</p><p class="MsoPlainText"><br></p><p class="MsoPlainText">Receiving is a different setup but it works fine.</p><p class="MsoPlainText"><br>
</p><p class="MsoPlainText">Please HELP ;-(<br></p><br>-- <br><b><span style="font-family:tahoma,sans-serif"><font size="2">Kind Regards<br><span style="font-family:arial black,sans-serif">Martin Muraguri</span><br>C: +254726937792 / +254736594985<br>
E:  <a href="mailto:martinmur87@gmail.com" target="_blank">martinmur87@gmail.com</a> / martin.m@OctoberICT.com<br>W: <span style="color:rgb(102, 0, 0)"><a href="http://www.OctoberICT.com" target="_blank">www.OctoberICT.com</a></span><br>
<br>October ICT *<span style="color:rgb(51, 51, 0)">Plug and Play!</span>*</font></span></b><br>