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PST is a file extension and it stores all the data that has come from emails to the contacts and calendars. Multiples of these files can be used with one copy of outlook at the same time.
PST stands for Personal Storage Tables. These are also known as personal folders or personal files. It is not created by Outlook or the Exchange server. Instead, you (or any user, for that matter) can create it to store all your emails, contacts, calendar entries etc. These PST files can be stored anywhere in your computer and it makes it that much easier for you to keep a backup copy of your PST files or move it from one computer to another.
.pst - personal storage table
When we connect ms outlook with a POP3 account, it creates .pst file
Download the third party converter software like OST to PST converter and resolve your problem with corrupted Outlook mailbox by following some simple instructions, don’t go with traditional method because it is very time-consuming, complicated and very risky also.
A Personal Folders file (.pst) is an Outlook data file that stores your messages and other items on your computer. This is the most common file in which information in Outlook is saved by home users or in small organizations. Home users usually use an Internet service provider (ISP) to connect to the Internet. The ISP also provides one or more email accounts. The most common types of accounts are referred to by their Internet protocol names — POP3 and IMAP. Another type of account is an HTTP or web-based account that works similar to IMAP email accounts. All three account types use a .pst file.
Your items can also be moved or archived to an Outlook Data File (.pst). Because a .pst file is kept on your computer, it is not subject to mailbox size limits on the mail server. By moving items to a .pst file on your computer, you can free up storage space in the mailbox on your mail server. Outlook can be configured to deliver new items to a .pst file, but if you do this, it has several disadvantages. This includes being unable to work with your items when you are using Microsoft Outlook Web Access with the Exchange Server email account or when you are working on another computer.
