createUnoService("com.sun.star.system.SimpleSystemMail") not working

In the documentation here, SimpleSystemMail is shown as a service in module com.sun.star.system.

When I execute the following line of code, nothing is returned:

objClient = createUnoService("com.sun.star.system.SimpleSystemMail")

Why is my code silently failing? "8-[

Any help would be appreciated.
Cheers,
Doug

I think I read that these interface specifications were written before the actual code to implement it, and so the code might not actually exist or be a stub. I’m sure of that for OO (Open Office), and pretty sure of it for LO as most of LO is actually just a fork of OO.
But it is beyond me at this point to look at the actual code, but perhaps someone else could look into that.

Thanks EasyTrieve - that sounds plausible, especially as SimpleCommandMail works fine.

Would that also be why calling objMessage.setOriginator("somebody@gmail.com") is ineffective? I want to send a message from a mail account which is not the default in Evolution, but the message always come up with my default account as the originator. For example, I have an account for myself and another for a club I belong to; my own account is the default and I want to send a message from my club account.

, hope you figure it out, and if so pls report back here.