> > I also believe there is a kernel.org service for sending patch series,
> > but i'm not sure I remember the details.
> 
> https://b4.docs.kernel.org/en/latest/contributor/send.html

It says:
The kernel.org endpoint can only be used for kernel.org-hosted projects.
If there are no recognized mailing lists in the to/cc headers, then the
submission will be rejected.

If I want to test the email sending service, how could I test it with sending
just to myself?  Maybe it allows only sending to the sender.