Are there any best practices for sending emails in PHP, especially when dealing with multiple recipients?

When sending emails to multiple recipients in PHP, it is important to follow best practices to ensure efficient delivery and avoid potential issues such as being marked as spam. One common approach is to use a loop to send individual emails to each recipient, rather than sending a single email with all recipients in the "To" field. This helps personalize the emails and prevents recipients from seeing each other's email addresses. 

// List of recipients
$recipients = array('recipient1@example.com', 'recipient2@example.com', 'recipient3@example.com');

// Email subject and message
$subject = 'Your Subject Here';
$message = 'Your email message here';

// Send individual emails to each recipient
foreach ($recipients as $recipient) {
    $headers = 'From: your_email@example.com' . "\r\n" .
               'Reply-To: your_email@example.com' . "\r\n" .
               'X-Mailer: PHP/' . phpversion();

    // Send the email
    mail($recipient, $subject, $message, $headers);
}

Keywords

PHP email multiple recipients SMTP mail function

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