问有没有办法检测电子邮件地址的假域名？使用Perl，php，javascript？

EN

if (checkdnsrr('test.nl', 'A')) // or use ANY or for other see above link
{
    echo 'Domain exists';
}
else 
{ 
    echo 'Domain does not exist'; 
} 

 <?php 

if (checkdnsrr('google.com', 'A')) // or use ANY or for other see above link
{
    echo 'Domain exists';
}
else 
{ 
    echo 'Domain does not exist'; 
}

?>
//Output = Domain exists

if (checkdnsrr('fakewebtesting.com', 'A')) // or use ANY or for other see above link
{
    echo 'Domain exists';
}
else 
{ 
    echo 'Domain does not exist'; 
}

?>
  //Output = Domain does not exists