What best practices should be followed when setting up email functionality in PHP to ensure reliable delivery and response handling?

When setting up email functionality in PHP, it is important to use a reliable email service provider, properly configure your mail server settings, handle errors gracefully, and validate user input to prevent injection attacks. Additionally, implementing proper email headers and using a secure transport layer such as SMTP over SSL can help ensure reliable delivery and response handling. 

// Example code snippet for setting up email functionality in PHP using PHPMailer library

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'vendor/autoload.php';

$mail = new PHPMailer(true);

try {
    $mail->isSMTP();
    $mail->Host = 'smtp.example.com';
    $mail->SMTPAuth = true;
    $mail->Username = 'your@example.com';
    $mail->Password = 'your_password';
    $mail->SMTPSecure = 'ssl';
    $mail->Port = 465;

    $mail->setFrom('from@example.com', 'Your Name');
    $mail->addAddress('recipient@example.com', 'Recipient Name');
    $mail->isHTML(true);
    $mail->Subject = 'Subject';
    $mail->Body = 'Email body content';

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

Keywords

SMTP PHPMailer SPF DKIM bounce handling

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