What are the best practices for sending bulk email notifications in PHP?

When sending bulk email notifications in PHP, it is important to use a reliable email service provider to handle the delivery of emails. This helps ensure that the emails are delivered successfully and that they do not end up in spam folders. Additionally, it is recommended to use a queue system to send emails in batches rather than all at once to avoid overwhelming the server and potentially getting flagged as spam. 

// Example code using a queue system to send bulk email notifications

// Initialize your email service provider (e.g. using PHPMailer or another library)
$email = new PHPMailer();

// Set up your email settings (e.g. SMTP server, sender email, etc.)
$email->isSMTP();
$email->Host = 'smtp.example.com';
$email->SMTPAuth = true;
$email->Username = 'your@example.com';
$email->Password = 'your_password';
$email->SMTPSecure = 'tls';
$email->Port = 587;

// Loop through your list of recipients and add them to the email queue
$recipients = ['recipient1@example.com', 'recipient2@example.com', 'recipient3@example.com'];
foreach ($recipients as $recipient) {
    $email->addAddress($recipient);
}

// Send the emails in batches of 100 recipients
$batchSize = 100;
$chunks = array_chunk($recipients, $batchSize);
foreach ($chunks as $chunk) {
    foreach ($chunk as $recipient) {
        $email->addAddress($recipient);
    }
    $email->send();
    $email->clearAddresses();
}

Keywords

SMTP PHPMailer Mailgun SendGrid email deliverability

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