How to hide set from mail on smtp php mail

When sending emails using PHP's mail() function or a library like SwiftMailer, the Set-Cookie header is sent by default. This can be a security risk if you're sending sensitive information, as it can be intercepted by an attacker.

To hide the Set-Cookie header, you can use the following methods:

Method 1: Using PHP's mail() function

You can use the extra_headers parameter to specify custom headers. To hide the Set-Cookie header, you can set an empty string for the Set-Cookie header:

$headers = array(
    'From' => '[email protected]',
    'Subject' => 'Test Email',
    'Set-Cookie' => '', // Set an empty string for the Set-Cookie header
);

mail('[email protected]', 'Test Email', 'Hello, world!', $headers);

Method 2: Using SwiftMailer

If you're using SwiftMailer, you can set the setCookie property to false when creating the message:

$message = Swift_Message::newInstance()
    ->setSubject('Test Email')
    ->setFrom('[email protected]')
    ->setTo('[email protected]')
    ->setBody('Hello, world!')
    ->setCookie(false); // Set setCookie to false

$transport = Swift_SmtpTransport::newInstance('smtp.example.com', 587);
$transport->setUsername('your-username');
$transport->setPassword('your-password');

$mailer = Swift_Mailer::newInstance($transport);
$mailer->send($message);

Method 3: Using PHPMailer

If you're using PHPMailer, you can set the SetCookie property to false when creating the message:

$mail = new PHPMailer();
$mail->setFrom('[email protected]');
$mail->addAddress('[email protected]');
$mail->Subject = 'Test Email';
$mail->Body = 'Hello, world!';
$mail->SetCookie = false; // Set SetCookie to false

$mail->Send();

By using one of these methods, you can hide the Set-Cookie header and reduce the risk of sensitive information being intercepted.