After upgrading to Yosemite, one of a few other problems, is that I can't connect to my Telus email account. I re-entered username, and password, I get a message that the password can't be transmitted securely, I go ahead anyway but it still doesn't connect, i called up Telus i spent 3 hours on the phone trying to resolve this problem , Telus got it back ,but only for a while, they finally gave up.I called Apple they got the Telus Email back , but still can not keep the server working, i really complained to apple about this new OS X update, and told them they are creating more problems , with those awful updates, they apologize , and trying to fix the problem, my TELUS account is still not working.I will try again tomorrow. What a day wasted on the phone