How to configure WAMP (localhost) to send email using Gmail?

Gmail servers use SMTP Authentication under SSL or TLS. I think that there is no way to use the mail() function under that circumstances, so you might want to check these alternatives:

• PEAR::Mail
• phpMailer
• NetteMail

They all support SMTP auth under SSL.

You'll need to enable the php_openssl extension in your php.ini.

Additional Resources:

• How to Send Email from a PHP Script Using SMTP Authentication (using PEAR::Mail)
• Send email using PHP with Gmail (using phpMailer)
• Mailing using NetteMail

$mail = new PHPMailer(); // create a new object
$mail->IsSMTP(); // enable SMTP
$mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for Gmail
$mail->Host = "smtp.gmail.com";
$mail->Port = 465; // or 587
$mail->IsHTML(true);
$mail->Username = "email@gmail.com";
$mail->Password = "password";
$mail->SetFrom("example@gmail.com");
$mail->Subject = "Test";
$mail->Body = "hello";
$mail->AddAddress("email@gmail.com");

 if(!$mail->Send()) {
    echo "Mailer Error: " . $mail->ErrorInfo;
 } else {
    echo "Message has been sent";
 }

This code above has been tested and worked for me.

It could be that you needed $mail->SMTPSecure = 'ssl';

Also make sure you don't have two step verification switched on for that account as that can cause problems also.

UPDATED

You could try changing $mail->SMTP to:

$mail->SMTPSecure = 'tls';

It's worth noting that some SMTP servers block connections. Some SMTP servers don't support SSL (or TLS) connections.

In WAMP Server, if you are running from a command line you are using PHP CLI.

The PHP CLI uses a different php.ini file to that used when php runs in apache.

Edit c:wampbinphpphp5.x.yphp.ini

and uncomment the php_sockets extension line and any other extensions you may need when running PHP CLI.