lzensinger wrote:
My email works fine when I log into email at the site of the service provider (ie, google, iCloud), but no longer loads onto the Mac email app. How do I fix this?
Use the connection Doctor for some insight —> Show Details
Use Connection Doctor in Mail on Mac - Apple Support
For problem accounts the go to way to sort things out is to delete the account(s) from the Mail.app, then add it back.
Remove email accounts in Mail on Mac
Remove email accounts in Mail on Mac - Apple Support
Add email accounts in Mail on Mac - Apple Support
Add email accounts in Mail on Mac - Apple Support
Note—
IMAP accounts stay on the server, so no local loss, when you re-sync
POP accounts download and remove from the server—therefor save your inbox/sent box if you want them
“On My Mac" is just that, local folders you created and moved mail into. So no loss