Re: What's the best way to auto-sign some emails but not all?

Trevor Arjeski <[email protected]> writes:
> Bjørn Mork <[email protected]> writes:
>
>> Is there a nice way to always sign emails based on e.g. the current From
>> address?  I don't want to sign everything, but I would like to sign all
>> emails I send from one specific address.
>
> Hi Bjørn,
>
> For me, I am signing all messages and just removing the "secure" tag
> when I am writing on a mailing list or something.

Yes, that's a possibilty.  But do hate manual procedures for anything
that can be automated.  And knowing myself, I am going to forget this
47% of the time.  I'll remember it if the passphrase box shows up.  But
I don't want to disable caching, and I am sure that will result in some
emails going out with an unwanted gpg signature. Not a big problem,
maybe.  But we're looking for the perfect solution here :-)

> I do this by adding a hook on `message-setup-hook' that calls
> `mml-secure-message-encrypt'.
>
> Therefore, you can add a similar hook with the help of a function (or
> just lambda), for example:
>
> #+BEGIN_SRC emacs-lisp
> (defun my/mml-secure-message-encrypt ()
>   "Encrypt all messages when we are sending as [email protected]. Do nothing
> for all other From addresses."
>   (when (string= message-sendmail-envelope-from
>                  "[email protected]")
>     (mml-secure-message-encrypt)))
>
> (add-hook 'message-setup-hook #'my/mml-secure-message-encrypt)
> #+END_SRC
>
> Let me know if that is what you want or helps at all.

Thanks a lot!  It does not work any better, but at least it shows me how
easy adding a hook would be.

And it also made me look at how the gnus posting styles are implemented.

I tried your suggestion with message-sendmail-envelope-from replaced by
user-mail-address, since SPF prevents me from changing the envelope
along with the from address.

Unfortunately, this works exacly like using "body" or "eval" in a
posting style.  It's fine with an empty buffer, but not when replying
with quoted text.  Which isn't surprising after having looked at
gnus-configure-posting-styles in gnus-msg.el.

What gnus-configure-posting-styles does under the hood is

        (add-hook 'message-setup-hook
                  (cond
                   ((eq 'eval (car result))
                    #'ignore)
                   ((eq 'body (car result))
                    (let ((txt (cdr result)))
                      (lambda ()
                        (save-excursion
                          (message-goto-body)
                          (insert txt)))))

etc.

Not exactly sure how all this works, but it looks like the yanked text
must be inserted into the buffer at a later stage.


Bjørn