[ietf-dkim] MLMs and the use of multipart/alternative to preserve original DKIM signature and at the same time add a new DKIM signature

[Graham Murray]

Ian Eiloart <iane at sussex.ac.uk> writes:

> So, in an ideal world, mail clients would expose the List-* headers 
> (especially the unsubscribe* header) in ways that are useful to the user, 
> and obviate the need for MLMs to mess with subject lines and bodies.
>
> *In my view, MLMs are required in UK law to add unsubscribe information in 
> a way that users can easily find it. The List-unsubscribe header isn't 
> adequate, only because very few clients display it.

There is not always even the need to expose these to the user. Some mail
clients (such as gnus), when they detect List-* headers add an
unsubscribe menu (and because it is emacs, keyboard) action.