Idea for push notifications on mobile devices

Hello everyone, The current implementation of push notification in Thunderbird keeps a persistent connection to the email servers and consumes a lot more battery/compute. An alternative idea that is used by some other projects like Bitwarden is a push notifications relay. https://bitwarden.com/help/configure-push-relay/ 1. A service running not on the phone keeps a connection open to the email servers. This can be a discrete application and it can optionally be bundled into Thunderbird desktop. 2. A website similar to push.bitwarden.com where users can generate "proxy" tokens for the real push tokens for their installations or maybe we can share the original push token directly instead of relaying notifications through thunderbird infra? I will prefer the latter but I have not thought about the security considerations of exposing the real push notification token 3. The discrete application or Thunderbird desktop can send a message to GCM/APM using the token when they receive an email. This is the only blocker for me in adopting thunderbird on android and I really want to do it but immediate push notifications that don't impact battery/compute are a priority for me.