Using my yahoo migrated cox email with Mac OS is a disaster

Cox sending us to yahoo was the worst thing ever!  Yahoo mail does not work well with Mac Mail.  I have had to reset my account 100's of times.  Once I think I have it working again it stops working.  I constatantly cannot send outgoing messages.  I have tried every opltion listed to try and fix it to no avail. I'm very very close to leaving cox for good.