isSMTP(); //Enable SMTP debugging // 0 = off (for production use) // 1 = client messages // 2 = client and server messages $mail->SMTPDebug = 0; //Ask for HTML-friendly debug output $mail->Debugoutput = 'html'; //Set the hostname of the mail server $mail->Host = 'smtp.gmail.com'; //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission $mail->Port = 587; //Set the encryption system to use - ssl (deprecated) or tls $mail->SMTPSecure = 'tls'; //Whether to use SMTP authentication $mail->SMTPAuth = true; //Set AuthType $mail->AuthType = 'XOAUTH2'; //User Email to use for SMTP authentication - Use the same Email used in Google Developer Console $mail->oauthUserEmail = "someone@gmail.com"; //Obtained From Google Developer Console $mail->oauthClientId = "RANDOMCHARS-----duv1n2.apps.googleusercontent.com"; //Obtained From Google Developer Console $mail->oauthClientSecret = "RANDOMCHARS-----lGyjPcRtvP"; //Obtained By running get_oauth_token.php after setting up APP in Google Developer Console. //Set Redirect URI in Developer Console as [https/http]:////get_oauth_token.php // eg: http://localhost/phpmail/get_oauth_token.php $mail->oauthRefreshToken = "RANDOMCHARS-----DWxgOvPT003r-yFUV49TQYag7_Aod7y0"; //Set who the message is to be sent from //For gmail, this generally needs to be the same as the user you logged in as $mail->setFrom('from@example.com', 'First Last'); //Set who the message is to be sent to $mail->addAddress('whoto@example.com', 'John Doe'); //Set the subject line $mail->Subject = 'PHPMailer GMail SMTP test'; //Read an HTML message body from an external file, convert referenced images to embedded, //convert HTML into a basic plain-text alternative body $mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__)); //Replace the plain text body with one created manually $mail->AltBody = 'This is a plain-text message body'; //Attach an image file $mail->addAttachment('images/phpmailer_mini.png'); //send the message, check for errors if (!$mail->send()) { echo "Mailer Error: " . $mail->ErrorInfo; } else { echo "Message sent!"; }