Why is the post immediately below the OP’s question highly ranked? It has no answer in it. It’s just another report of the same issue.
And why, after I and others offered working solutions, (Mail is fine here) have contributors in this thread not reported back on testing the remedies?
What is the point of giving a working solution if all the subsequent replies are from users who obviously haven’t read any of the posts?
A quick heads up: I had this issue. I found a fix. I posted it.
Quite what the point of this ‘community’ is if members don’t actual be a part of it but just keep on repeating the same stuff with no participation, (ie: read and test answers) I fail to see.
My Mail app is now running as it should - if yours isn’t tough luck.
Make another thread about it.