The quickest and easiest way to fix this is delete the user profile and create another one. Most likely the mail server information is set up incorrectly. I have looked at these settings so many times and couldn't see my mistake but after hours of frustrations found a comma for a period and other simple mistakes that are hard to see so I just got into the habit of deleting the user folder and just start a new one. Much quicker and easier on the head.
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