Apple Mail cannot login mail accounts - login through browser works
Apple Mail fails to log into six accounts, can log into one.
I have no trouble logging into the accounts via browser.
What is this beastly app up to now? Why doesn't it work? I haven't changed anything. I have seen this is a problem occurring to some, but I couldn't find a solution online.
MacBook Pro with Retina display, macOS Sierra (10.12.6), 512 Gb SSD, 16 Gb RAM,