Request read receipt when sending email through X++

Hello,

In Outlook, there is an option to request read receipt from receiver when he opens an email. I want to achieve it through X++ with SysMailer class and if I am right, it could be done with SysMailerFields.

I tried to pass it to SysMailer at new() method like this:

_fields.add("Disposition-Notification-To", "[...]@[...]");

But it's not working (or it is working, but my mail server refuses to pass it?). 

Did anybody do that kind of things and succeeded? I would appreciate your help, thanks!