How can PHP beginners ensure that their email scripts comply with SMTP authentication and avoid being marked as spam?

To ensure that email scripts comply with SMTP authentication and avoid being marked as spam, PHP beginners should use a reputable SMTP service provider, such as Gmail or SendGrid, to send emails. This involves setting up SMTP authentication credentials in the PHP script to authenticate with the SMTP server before sending emails. Additionally, including proper email headers, such as a valid "From" address and a relevant "Subject" line, can help improve deliverability and reduce the likelihood of emails being marked as spam. 

<?php
// Set SMTP authentication credentials
$smtpUsername = 'your_smtp_username';
$smtpPassword = 'your_smtp_password';

// Set up PHPMailer library
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'vendor/autoload.php';

$mail = new PHPMailer(true);

try {
    //Server settings
    $mail->isSMTP();
    $mail->Host = 'smtp.yourprovider.com';
    $mail->SMTPAuth = true;
    $mail->Username = $smtpUsername;
    $mail->Password = $smtpPassword;
    $mail->SMTPSecure = 'tls';
    $mail->Port = 587;

    //Recipients
    $mail->setFrom('from@example.com', 'Your Name');
    $mail->addAddress('recipient@example.com', 'Recipient Name');

    //Content
    $mail->isHTML(true);
    $mail->Subject = 'Subject of your email';
    $mail->Body    = 'Body of your email';

    $mail->send();
    echo 'Email has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
?>

Keywords

PHP SMTP authentication email scripts spam deliverability

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