The possible reasons could be corrupted Outlook PST files or a virus or malware infection. There could be several reasons due to which Outlook keeps closing itself or crashes on startup. The first thing that clicks in mind is, the problem could have occurred due to an outdated emailing app, or bugs in the software, that’s right sometimes, but not always. Besides, it also helps you manage other tasks like contacts, scheduling important dates on the calendar, managing the add-ins, etc.ĭespite all these features, the popular email users come across an unusual problem when Outlook keeps crashing itself debarring them from sending an email or reading an attachment. Microsoft Outlook is amongst the most popular email client across the globe used by many for personal or professional emailing.