For a second I thought I had made the perfect solution for this, but then I realized my problem was the opposite. I was looking for a way to receive notifications from systems that can only send emails. So I quickly made the Mail2Gotify service and have been using it for the past while.
I’ll post it here anyway in case you want to switch from emails to Gotify in the future!
If you’re up for using Jellyfin and have satellite devices, you can check out something I’m working on to achieve this: https://github.com/MattMckenzy/Homehook
The main branch was compatible with chromecast devices, but I’ve stopped maintaining it in favor of the v2 branch, where HomeHook communicates directly with satellite devices through HomeCast.
Let me know if you have any questions about it, always glad to help!