email address validation
<blockquote>
  <p><strong>Possible Duplicates:</strong><br />
  <a href="http://stackoverflow.com/questions/161342/is-there-a-php-library-for-email-address-validation">Is there a php library for email address validation?</a><br />
  <a href="http://stackoverflow.com/questions/565504/how-to-check-if-an-email-address-exists-without-sending-an-email">How to check if an email address exists without sending an email?</a>  </p>
</blockquote>

<p>hi guys,</p>

<p>how can i validate the email address to email provider just like yahoo?</p>

<p>scenario:</p>

<p>asdfasdf@yahoo.com</p>

<p>how can i validate it to yahoo.com that the email stated above is valid?</p>

<p>Thanks in Advance.</p>

<p>---- PHP Rules ----</p>
