There you have it, it never took long for OS X 10.10 Yosemite problems start to appear, as we are hearing some of our readers are having issues with their emails. The most common problem is that the Mail will not open following the upgrade to Yosemite, and we can fully understand why some user are unhappy, especially after putting up with the bugs within iOS 8 over the past few weeks.
We should not be too surprised that the Yosemite upgrade causes email problems, as we seem to remember the same thing happening when people upgraded to Mavericks last year. One reader said he thought it could be due to him using a late 2008 MacBook Pro, but this should not be an issue as it is on the list of compatible devices.
Those who do get a little further have found that Mail will open for them, although they keep getting the same message appear, and that is the password is incorrect.
Another issue is where people can open Mail and even sign in, yet cannot fetch any mail. Apple had this issue with Mavericks and so you could try the same solution for that version, which is go to mailbox and take all accounts offline, then go to Mailbox once again and select get all mail.
Failing that, we guess you will just have to wait for a fix, although we will keep you informed of any workarounds.