How can one address the issue of "SMTP server response: 530 Authentication required" when trying to send emails in PHP?

To address the issue of "SMTP server response: 530 Authentication required" when trying to send emails in PHP, you need to ensure that your SMTP server requires authentication and provide the correct credentials in your PHP script. 

<?php
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";
$headers = "From: sender@example.com";

$smtp_username = "your_smtp_username";
$smtp_password = "your_smtp_password";

$smtp_host = "smtp.example.com";
$smtp_port = 587;

$transport = (new Swift_SmtpTransport($smtp_host, $smtp_port))
  ->setUsername($smtp_username)
  ->setPassword($smtp_password);

$mailer = new Swift_Mailer($transport);

$message = (new Swift_Message($subject))
  ->setFrom([$smtp_username => 'Sender Name'])
  ->setTo([$to])
  ->setBody($message);

$result = $mailer->send($message);
if($result) {
  echo "Email sent successfully!";
} else {
  echo "Failed to send email.";
}
?>

Keywords

SMTP authentication 530 email sending PHP

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