All data available in to Outlook, directly stores in
‘Personal Storage Table’ which works as a database for Outlook. PST file is the
most vital part of Microsoft Outlook. All the messages found in Outlook also
saves in .pst file format.
Microsoft PST file gives a way to store user’s Outlook data enabled
with POP, IMAP and web based email accounts. In case, you import all messages
of Gmail in to Outlook via POP/IMAP protocol then it can easily appear in
Outlook mailbox.