cannot send emails with my msn email address
none of my Macs (5) will send emails for my MSN mail account, can't log in. This started in the past couple of months for every Mac and both of our email accounts. I have done recent OS updates and upgrades. Our iPads and iPhones work fine. Receiving email works for the most part but sometimes I have to take my accounts offline and then back online.
MacBook Pro 13″, macOS 10.14