How do I stop Mail from constantly asking for passwords

I know this has come up lots of times but nothing I try fixes the issue. Mac Mail constantly asks me for passwords.

Hotmail is the worst for some reason. I have fixed keychain, removed password from keychain, changed password, removed account and added again and still it goes on and on, several times an hour!

I have exhausted all advice i found on here and i can't think of anything else to try. it is most frustrating. has anyone found a new fix for this issue?

also, i have no idea where to post this as nothing comes up when searching for mail or email !