Pro Sites E-Mail Premium Support not working with Custom Mail Senders

Hey there,

i use this code in a mu-plugin for having the default mail senders changed:

// New E-Mail senders
add_filter('wp_mail_from', 'new_mail_from');
add_filter('wp_mail_from_name', 'new_mail_from_name');

function new_mail_from($old) {
    return '';
function new_mail_from_name($old) {
    return 'I am sending this to you!';

My problem is, if i try to offer premium e-mail support via pro sites, of course the sender is still changed.

Is there any possibility to not affect pro sites or any other workaround for that?