What are common issues with sending newsletters to a large number of users in PHP?

One common issue when sending newsletters to a large number of users in PHP is the risk of hitting email sending limits set by your hosting provider or email service provider. To solve this, you can use a third-party email sending service like SendGrid or Amazon SES, which are designed for sending large volumes of emails efficiently and reliably. 

// Example using SendGrid to send emails to a large number of users
require 'vendor/autoload.php'; // Include SendGrid library

$email = new \SendGrid\Mail\Mail(); 
$email->setFrom("your@example.com", "Your Name");
$email->setSubject("Your Subject");
$email->addTo("recipient1@example.com", "Recipient 1");
$email->addTo("recipient2@example.com", "Recipient 2");
// Add more recipients as needed

$sendgrid = new \SendGrid(getenv('SENDGRID_API_KEY'));
try {
    $response = $sendgrid->send($email);
    echo "Emails sent successfully!";
} catch (Exception $e) {
    echo 'Caught exception: '. $e->getMessage() ."\n";
}

Keywords

SMTP PHPMailer mail queue rate limiting spam folder

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