Why donʼt gnu.org and RMS sign mail? (was: Testing new mail server)

[Dmitry Alexandrov]

Mike Gerwitz <address@hidden> wrote:
> On Mon, Oct 28, 2019 at 19:51:04 +0200, Richard Stallman wrote:
>> Testing new mail server.
>
> This email is not legitimate---it did not originate from rms.  The headers 
> indicate it comes from the same host that attempted to imitate bill-auger on 
> gnu-linux-libre list.
>
> I'll forward to the appropriate people.  This is a significant problem.

This made me extremely curious: why does neither gnu.org sign mail server-side 
with DKIM, nor RMS sign his own with GPG?  Is there any idea behind it?

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