The main reason to save Outlook emails is to view Outlook emails easily. Why Users Want to Save Outlook Email as MSG on Mac OS X? One can download a singleĮmail from the server to access the message. Us to use the file for emailing and archiving purposes. The main reasons to save Outlook email as MSG file It is a normal text file and includes ASCII text for hyperlinks, If you want to do so you may need to use the file viewer or convert the OLM file into another format.įile: MSG file preserve the data in a message file with. OLM file designed in such a way that it cannot be re-open in Windows Outlook or and any other email client. OLM File: OLM file is a database used by Mac Outlook to store emails, contacts, calendars, tasks, and other user data.