while sent mail using gmail i will get mail

While sent mail using gmail I will get mail, but am using something mail like info@something.com I will get any mail

This my coding:

    <?php

    $name = $_POST["name"]; 
    $lname = $_POST["lname"]; 
    $email= $_POST["email"]; 
    $location =$_POST["location"]; 
    $org =$_POST["org"]; 
    $inquiry =$_POST["inquiry"]; 
    $message =$_POST["message"]; 
    $message = "Name :".$name."\n"."Last Name :".$lname."\n"."Email :".$email."\n"."Location :".$location."\n"."Organization :".$org."\n"."Inquiry :".$inquiry."\n"
    ."Questions/Comments  :".$message;
    $subject ="Visitor Enquiry";
    $to = "dev@webbylogic.com";
    $to = "info@subiconstruction.com";
    if(mail($to, $subject,$message)){ ?>
<script>
alert("Thank You for Contacting Us,We'll Get Back To You Soon");
document.location="contact-us.php";
</script>
<?php

echo "We Received Your enquiry, We'll get back to you soon";
     } 
      else{ 
echo "There were some errors sending enquiry, please try again";
     }

      ?>