Thanks, Iain, you got an answer for everything!
The msmtp-queue seems to be the perfect solution. I will try this out and
report back.
Best, Robert

On Wed, 5 Aug 2020 at 09:33, Iain Parris <ipv2.lst@parris.org> wrote:

> Hi Robert,
>
> Excerpts from Robert Winkler's message of 2020-08-04 13:22:23 -0700:
> > Hi, an efficient strategy to reduce email traffic is the delayed sending
> of
> > emails.
> > This also would allow the offline writing of emails.
> > Is there a way to do this in sup?
>
> Sup passes each email message to an external program to send
> (config.yaml, option "sendmail").
>
> For example, I personally use msmtp.
>
> To queue/delay messages, the solution would be to call an external
> program with this functionality built in.
>
> For example, I haven't used this personally, but perhaps something like
> msmtp-queue-scheduler may be of interest?
> <https://github.com/parisni/msmtp-queue-scheduler>
>
> (The README references Mutt, however, this should work with any MUA,
> i.e., should work with Sup.)
>
> Side note: I have received your email from 24 July re: keybindings,
> however, haven't yet looked in the detail required. I'll try to look
> within approximately the next week if I can, unless someone else on the
> mailing list beats me to it. :-)
>
> Kind regards,
> Iain
>
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