SendMail n'envois pas de mail

Bonjour,
Voilà j'ai suivie le tutoriel sur sendMail qu'il y a sur le site et le problème, c'est qu'il y a aucun mail envoyer.

<?php
$to = ' ****** 1@gmail.com';
$subject = 'Testing sendmail.exe';
$message = 'Hi, you just received an email using sendmail!';
$headers = 'From: sender@gmail.com' . "\r\n" .
            'Reply-To: sender@gmail.com' . "\r\n" .
            'MIME-Version: 1.0' . "\r\n" .
            'Content-type: text/html; charset=iso-8859-1' . "\r\n" .
            'X-Mailer: PHP/' . phpversion();
if(mail($to, $subject, $message, $headers))
    echo "Email sent";
else
    echo "Email sending failed";
?>

J'ai trouver se code qui permet d'envoyer un mail et le message est "Email sending failled", comme je suis sur gmail, j'ai repris le code (a peut près...)
Voici se que j'ai:

; configuration for fake sendmail
; if this file doesn't exist, sendmail.exe will look for the settings in
; the registry, under HKLM\Software\Sendmail
[sendmail]
; you must change mail.mydomain.com to your smtp server,
; or to IIS's "pickup" directory. (generally C:\Inetpub\mailroot\Pickup)
; emails delivered via IIS's pickup directory cause sendmail to
; run quicker, but you won't get error messages back to the calling
; application.
smtp_server=stmp.gmail.com
; smtp port (normally 25)
smtp_port=587
; SMTPS (SSL) support
; auto = use SSL for port 465, otherwise try to use TLS
; ssl = alway use SSL
; tls = always use TLS
; none = never try to use SSL
smtp_ssl=auto
; the default domain for this server will be read from the registry
; this will be appended to email addresses when one isn't provided
; if you want to override the value in the registry, uncomment and modify
default_domain=gmail.com
; log smtp errors to error.log (defaults to same directory as sendmail.exe)
; uncomment to enable logging
error_logfile=error.log
; create debug log as debug.log (defaults to same directory as sendmail.exe)
; uncomment to enable debugging
;debug_logfile=debug.log
; if your smtp server requires authentication, modify the following two lines
auth_username= ***** 1@gmail.com
auth_password= ******** a
; if your smtp server uses pop3 before smtp authentication, modify the 
; following three lines. do not enable unless it is required.
pop3_server=
pop3_username=
pop3_password=
; force the sender to always be the following email address
; this will only affect the "MAIL FROM" command, it won't modify 
; the "From: " header of the message content
force_sender= **** 1@gmail.com
; force the sender to always be the following email address
; this will only affect the "RCTP TO" command, it won't modify 
; the "To: " header of the message content
force_recipient=
; sendmail will use your hostname and your default_domain in the ehlo/helo
; smtp greeting. you can manually set the ehlo/helo name if required
hostname=

Voilà, dite moi si j'ai fait une erreur car actuellement, mon wamp et vert et mes mot de passe et correcte.

Merci de votre aide.
Cordialement;