Scheduling deferred sending of emails

[Jakub Jindra]

Hello Sébastian,

I remember replying to a similar post on Unix Stackexchange in the past:
https://unix.stackexchange.com/a/554369/85046

Best,
JJ

On 2023-07-29 12:07, Sébastien Hinderer wrote:
>Dear all,
>
>I would like to be able to respond to emails quickly to have it done but
>defer the actual sending of the response to slow down conversations.
>Ideally at the moment of sending I would specify a date and time after
>which I am fine with the mail being sent. For example, I respond to an
>email on Friday afternoon but can express that I want it to be actually
>sent anytime after next Monday 9pm. That could be by adding a special
>header to the email or by responding to questions at send time, I don't
>mind and it's not really the usesr interface I'd like to discuss here.
>
>What I rather would like to discuss is rather whether and how this could
>be implemented in the MUA/MTA framework mutt belongs to. I believe that
>more integrated solutions like Thunderbird do have such scheduled
>deferred sending features, but I have no idea how this can be achieved in
>presence of both an MUA and an MTA because the feature seems to be at
>the interface between the two: there needs to be a way for the MUA to
>tell the MTA about the deferred sending and of course the MTA does not
>only need to undestand it, it also needs to actually implement it.
>
>I had a superficial look to exim4 which I use as an MTA but didn't find
>anything related, but perhaps my search has been too shallow.
>
>I also considered adding another MTA between mutt and Exim4 which would
>keep the deferred mails until the scheduled date and pass them to Exim4
>only at that moment but it felt a bit a pity to have to use one
>dedicated software component just for that as, I assume, it would
>widely resemble a traditional MTA, having a lot in common with it.
>
>Any idea will be more than welcome.
>
>Best wishes,
>
>Seb.
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