Avoid duplicate emails in the sent folder

[André Rodier]

On Sun, 2021-04-04 at 06:45 -0600, @lbutlr wrote:
> On 04 Apr 2021, at 06:39, André Rodier <andre at rodier.me> wrote:
> > I continue to search on a simple solution, and I will come back to
> > you!
> 
> Seems the best solution is to get a web client that properly puts
> messages into DRAFTS and not appends them to Sent, but I guess that
> is too much to hope for?
> 
> I'd certainly at least complain about this misbehavior.
> 
I keep sending emails to the SOGo mailing, but it is very hard - if not
impossible - to get an aswer.

Even worst, my emails to the list are now silently dropped.

I am not proficient enough in Objective-C to submit a patch, but yes,
the behaviour is despicable.

André