
I recommend to store the pst-file in a location that is also included in your backups.Give the pst-file a name and set the location where you want to store your pst-file.You may not be prompted at all if you don’t have multiple store providers installed such as for iCloud. When prompted for the type of data file, select “Outlook data file (.pst)”.In the “New E-mail Delivery Location” dialog, click on: New Outlook Data File….Press the”Change Folder” button at the bottom.


While this guide is mainly focused on separating mails received from different accounts, the techniques can be used to sort mail based on other criteria as well. This guide introduces that and several other techniques which you can use to sort your email based on the account you have received it with. This allows you to still use only a single pst-file but still separate the incoming emails from each account.
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It also has an option which lets you decide which folder the emails should be delivered to without the use on any Message Rules. Outlook can still be configured this way today without losing the indication by which account you received a message with. In older versions of Outlook, all emails from all POP3 accounts used to be delivered to a single pst-file which created a Unified Inbox. When you configure multiple POP3 accounts in Outlook, all the emails will be delivered to their own dedicated pst-file.
