title: Reverse DNS for my elastic IP?
body: <p>We hosted our website over Amazon EC2 but now we are facing problem in delivering mails to yahoo and hotmail but Gmail is fine.</p>
  
  <p>But as per my knowledge this might be due to reverse DNS lookup.</p>
  
  <p>i also got a good explanation <a href="http://shlomoswidler.com/2009/07/sending-email-from-ec2.html" rel="nofollow">here</a></p>
  
  <p>but now when i am trying to fill the form(you can refer this link for detail <a href="https://forums.aws.amazon.com/ann.jspa?annID=624" rel="nofollow">https://forums.aws.amazon.com/ann.jspa?annID=624</a>) at Amazon for reverse dns for my elastic IP then it will ask me to provide a IP address for my Elastic IP and that IP address is used for reverse DNS look up.</p>
  
  <p>So now i am confused which IP address i should provide in that from.</p>
  
  <p>SO please help me on this issue.</p>
  
  <p>-Thanks </p>
  
  <p>P.S.</p>
  
  <p>I also find a reverse DNS address after entering my elastic IP at <a href="http://lookupserver.com/" rel="nofollow">http://lookupserver.com/</a> can i use that address at amazon for reverse DNS lookup.</p>