Also, do you use disposable emails? What for?
I have a lot of emails made with simple login and I use the same one only for three websites. Then I get all emails forwarded to the same email, and an email for personal use (family, work, friends…) also forwarded to that one. So something like this:
o o o o personal
\ | / /
| /
| /
o
I have an old gmail that I can’t quite get rid of yet, one company address for one of my jobs and one disroot that I use for everything else. I just added 3 accounts in Claws Mail and it gives a pretty good UX