Re: mail-host-address and i-did-not-set--mail-host-address--so-tickle-me

["Adam Sjøgren" <asjo@koldfront.dk>]

yarnton@tutanota.com writes:

> In principle, I don't see why I need to set my email parameters in my
> .emacs. Those are a concern of Notmuch and MSTMP only.

If Emacs is generating the Message-ID, I'd say Emacs needs enough
information to do so - the recommended way is to put the host after the @.

You could argue that the recommendation is outdated.

> I think Message-ID should reveal as little information as possible
> these days, as it can be used for identifying or at least
> fingerprinting messages.

(The whole purpose of the Message-ID is to uniquely identify the
message! I guess you mean identifying... the sender? But that's also
done in From:, right? If you are thinking of identifying the machine
sending, then that is recorded in the Received headers as well, right?)

> Whenever I use Emacs from a device where the hostname returns a fully
> qualified name like an IP address, that will leak into my Message-ID.

(It is usually also recorded in the headers the MTAs add.)

> Is there any technical reason for not constructing a random Message-ID
> like [UUID]@gnu.org?

Not except for what RFC 2822 recommends:

 · https://tools.ietf.org/html/rfc2822#section-3.6.4

At least according to the logic in the RFC, you should put something you
control on the right side of the @, and not somebody else's host/domain
- but as long as the whole thing is unique, you should be good.


  Best regards,

    Adam

-- 
 "I could't find my perfect attendance pencil, which        Adam Sjøgren
  is the only pencil I turned in [for sharpening]"     asjo@koldfront.dk