Ayush's answer was very useful, below a slightly simplified approach
1) Download PHPMailer
2) Extract to folder within you php project and rename it to phpmailer
3) Create gmail-sample.php and paste the following code:
<?php
require("phpmailer/class.phpmailer.php");
$mail = new PHPMailer();
// ---------- adjust these lines ---------------------------------------
$mail->Username = "your.username@gmail.com"; // your GMail user name
$mail->Password = "your-gmail-password";
$mail->AddAddress("friends.email@domain.com"); // recipients email
$mail->FromName = "your name"; // readable name
$mail->Subject = "Subject title";
$mail->Body = "Here is the message you want to send to your friend.";
//-----------------------------------------------------------------------
$mail->Host = "ssl://smtp.gmail.com"; // GMail
$mail->Port = 465;
$mail->IsSMTP(); // use SMTP
$mail->SMTPAuth = true; // turn on SMTP authentication
$mail->From = $mail->Username;
if(!$mail->Send())
echo "Mailer Error: " . $mail->ErrorInfo;
else
echo "Message has been sent";
?>
4) Send mail from Browser (e.g. http://localhost/your-project/gmail-sample.php).
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