High Sierra Mail not receiving
I upgraded from Yosemite to Mojave but I hated it - so many functions were not working properly or at alI, so I decided to back rev to High Sierra. This OS is mostly functional but Mail is not getting new messages. Connection Doctor shows green an all accounts and activity monitor shows mail "apparently" checking for main but it gets no new messages. I can see my mail using my phone and also with webmail but nothing is coming into the mail client. I can send mail OK.
MacBook Pro