Richard Stallman <rms@gnu.org> writes:

> You seem to be operating on the idea that we should make a separate face
> for every use.  I don't think that is a good idea.
>
> I agree that it is more general, and in a certain sense it is cleaner.
> But I am concerned that it is also a lot of bloat, and I am not sure
> we can afford that.
>
> Absent the intention to make a separate face for every use,
> why should we install separate faces for rmail?

My primary concern was to avoid having different faces for the header
names, which I don't like.  But I didn't want to make a change that
would change the default display of an email, so I added as many new
faces as required for the default display to stay the same.

Personally, I will be fine with just one `rmail-header-name' face.  
This is the way `message-mode' does it, there is just one face for 
every header name: `message-header-name'.

The patch below do this.