we are unable to send email for domain <a href="http://lcit.com">lcit.com</a><br><br>we get following error in the email logs:<br><br>

<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:black">Feb 20 00:54:17 D1OKH680RL postfix/smtp[4993]: 390077605C3:
to=<<a href="mailto:teerapat@MitsubishiElevatorAsia.co.th">xxxxxx@lcit.com</a>>,
relay=none, delay=13164, delays=13144/0/20/0, dsn=4.4.3, status=deferred (</span><span style="font-size:9.0pt;font-family:"Courier New";color:red">Host or domain name
not found. Name service error for name=<a href="http://lcit.com">lcit.com</a> type=MX:
Host not found, try again</span><span style="font-size:9pt;font-family:"Courier New";color:black">)</span></p><p class="MsoNormal"><br><span style="font-size:9pt;font-family:"Courier New";color:black"></span></p>

<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:black"><br></span></p>

please find the below dig and dig with trace result below:<br><br>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br>

<p class="MsoPlainText">[root@D1OKH680RL ~]# dig<span style> 
</span><a href="http://lcit.com">lcit.com</a><span style>  </span>mx</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">; <<>> DiG 9.2.4 <<>> <a href="http://lcit.com">lcit.com</a> mx</p>

<p class="MsoPlainText">;; global options:<span style> 
</span>printcmd</p>

<p class="MsoPlainText">;; Got answer:</p>

<p class="MsoPlainText">;; ->>HEADER<<- opcode: QUERY, status:
NOERROR, id: 6691 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 2,
ADDITIONAL: 5</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">;; QUESTION SECTION:</p>

<p class="MsoPlainText">;<a href="http://lcit.com">lcit.com</a>.<span style>                      </span>IN<span style>      </span>MX</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">;; ANSWER SECTION:</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>34176<span style>   </span>IN<span style>      </span>MX<span style>     
</span>10 <a href="http://mail.lcit.com">mail.lcit.com</a>.</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>34176<span style>   </span>IN<span style>      </span>MX<span style>     
</span>20 <a href="http://backmail.lcit.com">backmail.lcit.com</a>.</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>34176<span style>   </span>IN<span style>      </span>MX<span style>     
</span>12816 <a href="http://mx1.samart.co.th">mx1.samart.co.th</a>.</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>34176<span style>   </span>IN<span style>      </span>MX<span style>     
</span>20000 <a href="http://mx4.samart.co.th">mx4.samart.co.th</a>.</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>34176<span style>   </span>IN<span style>      </span>MX<span style>     
</span>5 <a href="http://mx1.lcit.com">mx1.lcit.com</a>.</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">;; AUTHORITY SECTION:</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>33947<span style>   </span>IN<span style>      </span>NS<span style>     
</span><a href="http://tee.samart.co.th">tee.samart.co.th</a>.</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>33947<span style>   </span>IN<span style>      </span>NS<span style>     
</span><a href="http://jiab.samart.co.th">jiab.samart.co.th</a>.</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">;; ADDITIONAL SECTION:</p>

<p class="MsoPlainText"><a href="http://mx1.lcit.com">mx1.lcit.com</a>.<span style>          
</span>33947<span style>   </span>IN<span style>      </span>A<span style>      
</span>203.149.3.68</p>

<p class="MsoPlainText"><a href="http://mail.lcit.com">mail.lcit.com</a>.<span style>         
</span>34176<span style>   </span>IN<span style>    </span><span style>  </span>A<span style>      
</span>203.149.3.71</p>

<p class="MsoPlainText"><a href="http://backmail.lcit.com">backmail.lcit.com</a>.<span style>     
</span>34176<span style>   </span>IN<span style>      </span>A<span style>      
</span>58.137.81.18</p>

<p class="MsoPlainText"><a href="http://tee.samart.co.th">tee.samart.co.th</a>.<span style>      
</span>860<span style>     </span>IN<span style>      </span>A<span style>      
</span>203.149.0.3</p>

<p class="MsoPlainText"><a href="http://jiab.samart.co.th">jiab.samart.co.th</a>.<span style>     
</span>858<span style>     </span>IN<span style>      </span>A<span style>      
</span>203.149.0.2</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">;; Query time: 0 msec</p>

<p class="MsoPlainText">;; SERVER: 155.14.30.133#53(155.14.30.133) ;; WHEN: Tue
Feb 21 20:39:55 2012 ;; MSG SIZE<span style>  </span>rcvd:
261</p>

<p class="MsoPlainText"> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</p>

<p class="MsoPlainText">[root@D1OKH680RL ~]# dig +trace <a href="http://lcit.com">lcit.com</a><span style>  </span>mx</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">; <<>> DiG 9.2.4 <<>> +trace
<a href="http://lcit.com">lcit.com</a> mx ;; global options:<span style>  </span>printcmd</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://j.root-servers.net">j.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style> </span><span style>                      </span>438530<span style>  </span>IN<span style>     
</span>NS<span style>      </span><a href="http://k.root-servers.net">k.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://l.root-servers.net">l.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://m.root-servers.net">m.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://a.root-servers.net">a.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://b.root-servers.net">b.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://c.root-servers.net">c.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://d.root-servers.net">d.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://e.root-servers.net">e.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://f.root-servers.net">f.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://g.root-servers.net">g.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://h.root-servers.net">h.root-servers.net</a>.</p>

<p class="MsoPlainText"><span style>                      
</span>438530<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://i.root-servers.net">i.root-servers.net</a>.</p>

<p class="MsoPlainText">;; Received 316 bytes from 127.0.0.1#53(127.0.0.1) in 1
ms</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://m.gtld-servers.net">m.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://a.gtld-servers.net">a.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://b.gtld-servers.net">b.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://k.gtld-servers.net">k.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://d.gtld-servers.net">d.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://c.gtld-servers.net">c.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://e.gtld-servers.net">e.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://i.gtld-servers.net">i.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://h.gtld-servers.net">h.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>             </span><span style>       </span>172800<span style> 
</span>IN<span style>      </span>NS<span style>      </span><a href="http://j.gtld-servers.net">j.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://f.gtld-servers.net">f.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://g.gtld-servers.net">g.gtld-servers.net</a>.</p>

<p class="MsoPlainText">com.<span style>                   
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://l.gtld-servers.net">l.gtld-servers.net</a>.</p>

<p class="MsoPlainText">;; Received 498 bytes from
192.58.128.30#53(<a href="http://j.root-servers.net">j.root-servers.net</a>) in 2 ms</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://jiab.samart.co.th">jiab.samart.co.th</a>.</p>

<p class="MsoPlainText"><a href="http://lcit.com">lcit.com</a>.<span style>              
</span>172800<span style>  </span>IN<span style>      </span>NS<span style>     
</span><a href="http://tee.samart.co.th">tee.samart.co.th</a>.</p>

<p class="MsoPlainText">;; Received 75 bytes from 192.55.83.30#53(<a href="http://m.gtld-servers.net">m.gtld-servers.net</a>)
in 268 ms</p>

<p class="MsoPlainText"> </p>

<p class="MsoPlainText">;; connection timed out; no servers could be reached</p>

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br><br>Regards,<br>Kshitij<br>