<p>Microsoft's Outlook e-mail program has been sending regular messages into the junk bin, Microsoft noted this week.</p><p>The problem is specific to using Outlook with Exchange Server 2013 or Office 365's Exchange Online service. The glitch is described in this Knowledge Base article, where Microsoft promises that is looking into the problem with more information to come. In the meantime, a few workarounds can be found in a blog post today by the Exchange team.</p><p>The problem stems from Microsoft taking a different approach with how junk mail gets filtered. Outlook now passes all mail through its junk mail filter, weighing which should be deemed spam and which is trusted. In the past, Exchange used a Messaging Application Programming Interface (MAPI) property called "PR_CONTENT_SCL" that indicated a "spam confidence level" for the message. Messages that were marked SCL -1 got through, but now Outlook just ignores the SCL property altogether, according to Microsoft's announcement.</p><p>The problem affects trusted e-mail from external domains, as well as internal traffic. While the company isn't offering a fix at present, there are three workarounds to try, according to the Exchange team.</p><p><a href="http://redmondmag.com/articles/2013/09/26/outlook-has-email-junk-problem.aspx">Keep reading...</a></p>