I've been using yahoo for 20 years. We've come so far together. But one thing just sticks around and it can be confusing. So on my one Yahoo Mail app I have two accounts and 2 additional mailboxes. But the thing is hard to to figure how to update insomnia, post a comment etc. I think it would make your already amazing service just that much better... If we could simply have 4 emails. Please consider doing away with the account and mailbox distinction.
With much respect and admiration,
A.