<?php
require 'PHPMailerAutoload.php';
require 'credential.php';

$mail = new PHPMailer;

$mail->SMTPDebug = 4;                               // Enable verbose debug output

$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'smtp1.gmail.com;';  // Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = EMAIL;                 // SMTP username
$mail->Password = PASS;                           // SMTP password
$mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587;                                    // TCP port to connect to

$mail->setFrom(EMAIL, 'Testing this');
$mail->addAddress('testemail123@outlook.com');     // Add a recipient              // Name is optional
$mail->addReplyTo(EMAIL);
$mail->isHTML(true);                                  // Set email format to HTML

$mail->Subject = 'Here is the subject';
$mail->Body    = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

if(!$mail->send()) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    echo 'Message has been sent';
}
?>

2018-02-23 04:50:28 Connection: opening to smtp1.gmail.com:587, timeout=300, options=array ()
2018-02-23 04:50:28 Connection failed. Error #2: stream_socket_client(): php_network_getaddresses: getaddrinfo failed: No such host is known. [C:wamp64wwwmailerphpmailerclass.smtp.php line 299]
2018-02-23 04:50:28 Connection failed. Error #2: stream_socket_client(): unable to connect to smtp1.gmail.com:587 (php_network_getaddresses: getaddrinfo failed: No such host is known. ) [C:wamp64wwwmailerphpmailerclass.smtp.php line 299]
2018-02-23 04:50:28 SMTP ERROR: Failed to connect to server: php_network_getaddresses: getaddrinfo failed: No such host is known. (0)
2018-02-23 04:50:28 Connection: opening to :587, timeout=300, options=array ()
2018-02-23 04:50:31 Connection: opened
2018-02-23 04:50:31 SMTP -> get_lines(): $data is ""
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "220 xxx ESMTP"
2018-02-23 04:50:31 SERVER -> CLIENT: 220 xxx ESMTP
2018-02-23 04:50:31 CLIENT -> SERVER: EHLO localhost
2018-02-23 04:50:31 SMTP -> get_lines(): $data is ""
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "250-xxx"
2018-02-23 04:50:31 SMTP -> get_lines(): $data is "250-xxx"
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "250-SIZE 20480000"
2018-02-23 04:50:31 SMTP -> get_lines(): $data is "250-xxx250-SIZE 20480000"
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "250-AUTH LOGIN"
2018-02-23 04:50:31 SMTP -> get_lines(): $data is "250-xxx250-SIZE 20480000250-AUTH LOGIN"
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "250 HELP"
2018-02-23 04:50:31 SERVER -> CLIENT: 250-xxx250-SIZE 20480000250-AUTH LOGIN250 HELP
2018-02-23 04:50:31 CLIENT -> SERVER: STARTTLS
2018-02-23 04:50:31 SMTP -> get_lines(): $data is ""
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "503 Bad sequence of commands"
2018-02-23 04:50:31 SERVER -> CLIENT: 503 Bad sequence of commands
2018-02-23 04:50:31 SMTP ERROR: STARTTLS command failed: 503 Bad sequence of commands
SMTP Error: Could not connect to SMTP host.
2018-02-23 04:50:31 CLIENT -> SERVER: QUIT
2018-02-23 04:50:31 SMTP -> get_lines(): $data is ""
2018-02-23 04:50:31 SMTP -> get_lines(): $str is "221 goodbye"
2018-02-23 04:50:31 SERVER -> CLIENT: 221 goodbye
2018-02-23 04:50:31 Connection: closed
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Message could not be sent.Mailer Error: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting