What are some best practices for sending emails with PHP to ensure delivery and receipt confirmation?

When sending emails with PHP, it's important to set proper headers, use a reliable SMTP server, and handle errors gracefully to ensure delivery and receipt confirmation. One way to achieve this is by using a library like PHPMailer, which simplifies the process of sending emails and provides built-in support for features like delivery and read receipt tracking. 

<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'vendor/autoload.php';

$mail = new PHPMailer(true);

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

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

    //Content
    $mail->isHTML(true);
    $mail->Subject = 'Subject';
    $mail->Body = 'Email body content';

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

Keywords

PHP email delivery receipt confirmation SMTP error handling

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