No. Tuta implemented their own notification service for privacy and Proton should too, or at least copy someone else's. They're being fucking lazy and it annoys me. It's their company though and I'm paying a different one that meets my needs. Everyone wins. I tried Proton again because I see it frequently recommended and it looks wonderful from a high level view. Unfortunately, almost of the services are half baked and useless for me as they are.