This is not actually a bug, more like a feature request. 😉

It would be amazing if it were possible to send emails at a certain time in the future.

I'm pretty sure there's nothing in the mail standards for it (at least that's what @Toniob tells me 🤷), in any case it needs an access to a database (to store the programmed email) and then check that the programmed time has arrive, to actually send the email (a few minutes late will not be a problem, it doesn't need to be extremely accurate, as long as it is sent.

Gmail does that, and I hate Google with a passion, so I don't want to rely on Google for such an important thing as my emails.

Expected behavior

I'm able to program an email with a given content and a date/time, and when the time comes, the mail is automatically sent, give or take a few minutes. 😄