[Users] That won't work.

[Paul]

On Mon, 12 Oct 2020 13:20:18 +0200
Michal Suchánek <msuchanek at suse.de> wrote: 

> I don't see how you could use the tamplate sanely, though.
> 
> If you allow passing the header as an argument and the argument is
> interpreted by the shell the user could quote it - if the header did not
> include quoting characters as well.

What I suggested was using %to, no shell involved.

with regards

Paul