How to Backup IMAP Emails in PST File Format?
If you need to keep your IMAP emails safe in PST format, the SysInfo IMAP Backup Tool makes the process smooth. After launching the tool, you sign in using your IMAP server details, and it displays all your email folders in a neat tree structure. You can pick only the folders you really need and then select PST as your preferred backup format. Some useful options—like skipping previously backed-up emails or removing duplicates—help make the backup clean and organized. After choosing where you want the PST file to be saved on your computer, you begin the backup, and the tool quietly converts all selected IMAP emails into a PST file you can open anytime in Outlook.
Read more: https://www.sysinfotools.com/imap-email-backup.php