How to Fix \"Mailer Error: SMTP connect() failed\" in PHPmailer?

Troubleshooting SMTP Connect() Failures in PHPmailer

Introduction

When attempting to send emails using PHPmailer, one might encounter the error "Mailer Error: SMTP connect() failed." This issue arises due to Google's implementation of a new authorization mechanism known as XOAUTH2.

Solution

To resolve this issue, follow these steps:

1. Enable Less Secure Apps in Google Account

• Log into your Google account and navigate to: https://www.google.com/settings/security/lesssecureapps
• Ensure that the option "Turn on access for less secure apps" is enabled.

2. Use TLS Over Port 587 Instead of SSL Over Port 465

• Modify the code to use TLS over port 587 instead of SSL over port 465. Replace the following lines:

  <code class="php">$mail->Host = "ssl://smtp.gmail.com";
  $mail->Port = 465;</code>

  with:

  <code class="php">$mail->Host = 'smtp.gmail.com';
  $mail->Port = 587;</code>

Sample Code

Here is the modified code:

<code class="php">require "class.phpmailer.php";
$mail = new PHPMailer(); 
$mail->IsSMTP();                              // send via SMTP
$mail->SMTPDebug = 2;  // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true;                       // turn on SMTP authentication
$mail->SMTPSecure = 'tls'; // secure transfer enabled REQUIRED for GMail
$mail->SMTPAutoTLS = false;
$mail->Host = 'smtp.gmail.com';
$mail->Port = 587;
$mail->Username = "[email&#160;protected]";        // SMTP username
$mail->Password = "mypassword";               // SMTP password
$webmaster_email = "[email&#160;protected]";       //Reply to this email ID
$email="[email&#160;protected]";                // Recipients email ID
$name="My Name";                              // Recipient's name
$mail->From = $webmaster_email;
$mail->FromName = "My Name";
$mail->AddAddress($email,$name);
$mail->AddReplyTo($webmaster_email,"My Name");
$mail->WordWrap = 50;                         // set word wrap
$mail->IsHTML(true);                          // send as HTML
$mail->Subject = "subject";
$mail->Body = "Hi,
This is the HTML BODY ";                      //HTML Body 
$mail->AltBody = "This is the body when user views in plain text format"; //Text Body 

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

By implementing these changes, you should be able to successfully send emails using PHPmailer.

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