I was facing the same problem. And recently I finally made the decision to migrate from gmail to Fastmail and use masked emails everywhere except a few trusted

I was facing the same problem. And recently I finally made the decision to migrate from gmail to Fastmail and use masked emails everywhere except a few trusted services. It’s not a trivial task and as of now the migration is still ongoing, but the result is amazing. Finally, no more triple-digit notification bubbles.