strange behaviour of getmxrr()
<p>I cant understand the reason of following behaviour of <a href="http://www.php.net/manual/en/function.getmxrr.php" rel="nofollow">getmxrr()</a></p>

<pre><code>var_dump(getmxrr ( "www.yahoo.com" , &amp;$mxhosts));  // output: boolean true  
var_dump($mxhosts);                                // output: array empty

var_dump(getmxrr ( "www.google.com" , &amp;$mxhosts));  // output: boolean false  
var_dump($mxhosts);                                 // output: null
</code></pre>

<p>I have refered many sites mentioning that <code>www.</code> must be removed to get mx-records. But my aim is not to have mx-records but to understand the reason of this strange behaviour.<br>
I expect some help from SO community.<br>
Thanking you in anticipation.</p>
