Are there any security concerns to be aware of when sending automated emails using PHP?

When sending automated emails using PHP, one security concern to be aware of is the possibility of injection attacks through user input in the email content. To prevent this, always sanitize and validate user input before including it in the email body. 

// Sanitize and validate user input before sending automated email
$emailContent = filter_var($_POST['email_content'], FILTER_SANITIZE_STRING);

// Send email
$to = 'recipient@example.com';
$subject = 'Automated Email';
$message = $emailContent;
$headers = 'From: sender@example.com';

mail($to, $subject, $message, $headers);

Keywords

PHP automated emails security concerns SMTP email headers

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