I can send from my iphone, ipad and on icloud.com, but not Outlook. Was working one day and not the next. I have tried changing my icloud password but to no avail, and have double checked my settings with Apple support and Microsoft Support. Receives just fine, but a few seconds after i hit send i get
5.7.8 Bad username or password (Authentication failed)..
Any advice greatly appreciated.
Just a quick update. I deleted and re-entered iCloud again. Received the same error message. When Outlook brought up the dialogue box asking me if I wanted to try to re-enter my password, I said, "Yes." I then removed the @me.com from my USERNAME and merely used the first part of my email address. This, miraculously, solved the problem. How bizarre!