Warning: mail() [function.mail]: SMTP server response: 553 We do not relay non-local mail, sorry

Question

The following script sends email using mail function . But i am unable to send an email.Upon clicking submit this gets displayed :

Warning: mail() [function.mail]: SMTP server response: 553 We do not relay non-local mail, sorry. in E:\xampp\htdocs\feedback.php on line 19
mail sent successfully

SCRIPT

<?php 
if( isset( $_REQUEST['email'] ) ) {
    $email = $_REQUEST['email'];
    $subject = $_REQUEST['subject'];
    $message = $_REQUEST['message'];
    mail("[email protected]" , $subject , $message , "From:".$email );
    echo "mail sent successfully";
}  else {
     echo "<form method = 'post' action = 'feedback.php'>
     Email of sender : <input name = 'email' type = 'text' /> <br/>
     Subject : <input name = 'subject' type = 'text'/> <br/>
     Enter your feedback here : <textarea name = 'message' rows = 15 cols = 40 > </textarea> <br/>
     <input type = 'submit'/>
     </form>";
   }
?>

I am using Apache as php server

Also tell why we have to write $subject , $message i.e with the $ sign in the mail argument , since we have declared $email , $message etc. , just above. Why can't we just write message , email , .. without the dollar sign?

Answer 1

Resolvendo: In Xampp menu,
Go to mercury admin-->Configuration menu-->MercuryS SMTP Server-->Connection control. In that window, remove the check on the checkbox. See below:

Then in php.ini file:

[mail function] SMTP=127.0.0.1 <------------------change localhost to ip local

smtp_port=25

Answer 2

1. You're using XAMPP which by default comes with Mercury, which is not configured to send mail to a different server by default. It is basically there for debugging. Instructions do exist to configure it to do so, but Windows + Apache is generally best only as a debugging environment in my experience.

2. PHP variables all have the $ before them. It's called a sigil. It is what distinguishes them from, say, constants, class definitions, and functions. If you want to assign a value and then send it into a function, you need to use variables. You can use define to set a constant if it is important enough, but trust me, those situations are rare and you should generally avoid them.

You can also do this, however:

mail("[email protected]" , 
      $_REQUEST['subject'] , 
      $_REQUEST['message'] , 
      "From:".$_REQUEST['email'] );