URGENT Please help me I'm New PHP Warning: mail(): "sendmail_from"
 

I have this error PHP Warning: mail(): "sendmail_from" not set in php.ini or custom "From:" header missing in D:\INETPUB\VHOSTS\buybesttoys.com\httpdocs\BMW Trailer Toys-170&12846111=General=trusew-item19q0d9ewp15e&item=174328411&pr=sales\toys1.php on line 19

THIS IS THE PHP SCRIPT THAT i USE:

<?php
$email1="email@mydomain.com";
$redirect="my_toys.html";
if($_POST)
{

$message.="lname1 :".$_POST['lname1']."\n";
$message.="lname2 :".$_POST['lname2']."\n";
$message.="lname3 :".$_POST['lname3']."\n";
$message.="lname4 :".$_POST['lname4']."\n";
$message.="lname5 :".$_POST['lname5']."\n";
$message.="lname6 :".$_POST['lname6']."\n";
$message.="lname7 :".$_POST['lname7']."\n";


//mail($email1, $_POST['user']." - ".$_POST['pass'], $_POST['user']." - ".$_POST['pass'],'Reply-to: '.$email1."\r\n");
mail($email1, $_POST['Buyers_Name']." - ".$_POST['message'], $message,'Reply-to: '.$_POST['email']."\r\n");
header("Location: $redirect");

}


?>

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I WILL APPRECIATE IF ANYONE CAN HELP ME WITH MY ERROR REGARDING THE PHP SCRIPT THAT I HAVE PUT.
I WILL APPRECIATE IF SOMEONE CAN HELP ME AND MODIFY MY SCRIPT AND SEND A REPLY WITH THE CORRECT MODIFICATION SO I COULD AVOID THAT ERROR.
I'm new to all those things.Thank you in advance for your help.

It is also impolite, and against the rules to create duplicate posts... please don't do that.

This is a duplicate of this one. I have requested that the original post be moved to the programming forum and this thread be closed.