if I can contribute, the work around to get rid of the outlook 2013 test email is to first update outlook 2013 to sp1
setup the email account like normal, only difference is in the outgoing smtp server, set it to google or local isp that allows "no Date header", under More Settings, Outgoing Server tab, provide the credentials OR untick for non authenticated mode. apply ok and Outlook will be ready to login to the imap server and attempt to send test email using another smtp server.
one the test email is sent, the email account will be registered in outlook. go back to the account setup, change the account setup to the correct outgoing smtp server. then you can configure under More Settings, Outgoing Server tab again, this time, tick the "My Outgoing Server (SMTP) requires authentication". Click ok, brings you back to the previous screen, this time, the "Automatically test account setting blah blah..." can be unticked unlike the first time you tried to setup the account. don't ask me why. but I think Microsoft have decided to make imap impossible to setup.
its for sure not the best method, but its a work around which I hope others can benefit from it. cos I tried many days and we are not getting any feedback from Microsoft. all listed solutions like above are all half baked or not even solutions. the army of Microsoft engineers are repeating themselves with half answers which doesn't work. but as with normal users, they demand outlook as they paid dollars for the whole office suite and they want to get their every penny work.
enough of ranting...
another issue that one have to take care, is that if user originally have a lot of folders and subfolders created, moving to outlook 2013 might face missing folders or incomplete emails. solution is to add "Inbox" as the root folder and do some testing to make sure you get the folders back. Depending on how the email account was utilised in previous outlook version, some "migration" of the folders are required to make sure the folders and emails are showing up correctly.
happy setting.....