Installed roundcube 1.5.1.
Use the additional_message_headers plugin and I want to put the user's email address in List-Unsubscribe .
But $_SESSION['username'] outputs an empty value.
$config['additional_message_headers']['List-Unsubscribe'] = '<mailto:'.$_SESSION['username'].'?subject=Unsubscribe>';
Is there no way? T.T