GitHub - mariusangelmann/Wiedervorlage: Email-based reminder service - schedule reminders by sending emails to time-coded addresses like [email protected]
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Email-based reminder service - schedule reminders by sending emails to time-coded addresses like [email protected] - mariusangelmann/Wiedervorlage
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The original was posted on /r/selfhosted by /u/mariusnoor on 2025-06-30 12:04:00+00:00.

Hey everyone!

So I kept forgetting to follow up with clients and it was driving me nuts. Tried a bunch of reminder apps but honestly couldn’t be bothered to actually use them.

Then I had this dumb/brilliant idea - what if I could just BCC myself with a time delay? Like when I’m emailing someone, just add mailto:myself[+[email protected]](mailto:[email protected]) to BCC and get the email back in 3 days?

Turns out Gmail (and most email providers) have this “plus addressing” thing where anything after the + still goes to your inbox. So I built a little service that:

  • Watches your inbox for these special addresses
  • Sends you back your original email at the right time
  • Works with stuff like +2h (2 hours), +7d (7 days), +1w (1 week)
  • Also works with other services than Gmail, I personally use it on my own custom mail server

Been using it for months and it’s honestly been a game changer. No more “oh shit I forgot to follow up” moments.

Just made some huge updates and open-sourced it in case anyone else has the same problem. It runs on your own server so your emails stay private. Also added a bunch of languages because why not.

GitHub: https://github.com/mariusangelmann/Wiedervorlage

Not trying to make this a big thing, just thought someone might find it useful!