aravind_v21:
Before confronting your ini file, try a quick test, by adding a FROM line in your mail script:
<?php
$to = "aravind.venkatachalam@sabre-holdings.com";
$subject = "Hi!";
$body = "Hi,\n\nHow are you?";
// from
$from = "From: $to";
if (mail($to, $subject, $body, $from)){
echo("Message successfully sent!");
}
else{
echo("Message delivery failed...");
}
?>
If this doesn't work, let me know.