My problem seems like:

1.) Yosemite OS X 10.10.1 problem OR

2.) Microsoft Outlook setting problem with Yosemite

Outlook 2011 for Mac worked fine until operating system was upgraded from Lion to Yosemite.  I have asked on the Apple community and they indicate that the problem lies with Microsoft so hopefully someone knows the answer and can direct me to a solution here or back at Apple.  

I am receiving error codes and multiple e-mails unless I delete them from my Yahoo mail account online.

Outlook 2011 for Mac continues to give me errors only when connecting to Yahoo mail

Error Code 16999  -  Inactivity timeout

Error Code 3253  -  Connection to server failed or was dropped

Error Code 17895  -  Connection to server failed or was dropped

Multiple e-mails is driving me crazy, I am sure there is a box that needs to be checked or unchecked but I do not know what settings to adjust.

I look forward to a solution...