On Thu 11 Jan 2018 at 19:33, Stefan Monnier wrote:

>> That will need an upcoming 'auth-source-xoauth2' package, as getting the
>> password involves doing some HTTP fetching. I have the code, just need
>> to find some time to add it to MELPA.
>
> BTW, your library can still work with Emacs-26 (and even Emacs-25) using
> a hack like:
>
>     (unless (cl-generic-p 'smtpmail-try-auth-method)
>       (let ((f (symbol-function 'smtpmail-try-auth-method)))
>         (fset 'smtpmail-try-auth-method nil)
>         (cl-generic-define-method 'smtpmail-try-auth-method nil
>                                   '(process mech user password)
>                                   nil f)))
>
> which turns the "regular function" smtpmail-try-auth-method into
> a "generic function".

Yes - and it can also work with Emacs-24 by advising the function
instead, which is probably what I'm going to do: if the cl-* functions
are there, and smtpmail is one, specialize it, otherwise advise it.

-- 
Cesar Crusius