We have been using Outlook 2003 in Windows XP, and just purchased two new computers from Dell with Windows 8 and Office 365, which includes Outlook 2013.  When new emails are received they are there until you read them, and after you read them they disappear.  I have looked at every possible setting to make sure they are not being archived or moved automatically.  It appears that I must move the email to a folder right then when it is being read or I will lose it.  That is not acceptable.  On our old system we could read an email and leave it right there in the in mail and it would be there until we manually did something with it.  We are retired and use these computers in our home.  My wife is having the same problem.  We are still using our old computers because we can't transfer our email to the new computers because of this problem.  Please tell me how to fix this.  Thank you.