What best practices should be followed when sending bulk emails using PHP and PHPmailer?

When sending bulk emails using PHP and PHPMailer, it is important to follow best practices to ensure deliverability and avoid being marked as spam. This includes properly configuring your email server, setting up SPF and DKIM records, avoiding sending too many emails at once, and providing an easy way for recipients to unsubscribe. 

// Example PHP code snippet for sending bulk emails using PHPMailer

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

// Include PHPMailer autoloader
require 'vendor/autoload.php';

// Create a new PHPMailer instance
$mail = new PHPMailer(true);

try {
    // Server settings
    $mail->isSMTP();
    $mail->Host = 'smtp.example.com';
    $mail->SMTPAuth = true;
    $mail->Username = 'your@example.com';
    $mail->Password = 'your_password';
    $mail->SMTPSecure = 'tls';
    $mail->Port = 587;

    // Recipients
    $mail->setFrom('your@example.com', 'Your Name');
    $mail->addAddress('recipient1@example.com', 'Recipient 1');
    $mail->addAddress('recipient2@example.com', 'Recipient 2');

    // Content
    $mail->isHTML(true);
    $mail->Subject = 'Subject line of the email';
    $mail->Body = 'HTML content of the email';

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

Keywords

PHP PHPmailer bulk emails SMTP email validation

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