Yes, but I would avoid deleting the original PST simply because it appears to contain old or unnecessary emails. Before removing an archive, it is better to inspect its folders and verify whether it contains important messages, contacts, calendars, attachments, or other business records.
A useful review should include the Inbox, Sent Items, Deleted Items, custom folders, contacts, calendar entries, and any folders created for projects or clients. Searching by sender, subject, keywords, date range, and attachment status can also help identify information that may otherwise be missed.
SysInfo PST Viewer can be used for this preliminary inspection without Microsoft Outlook. It supports previewing emails and other Outlook mailbox components, while its advanced search allows specific messages to be located using criteria such as From, To, Subject, date range, and whether an email contains attachments.
The software also supports ANSI and Unicode PST files and can load multiple files. Its read-only viewing approach is useful when the goal is to inspect an archive without making changes to the source file.
I would still keep the original PST until the review is complete and any required data has been securely archived or exported. For compliance, legal, or business records, maintaining an additional verified copy before deletion is a safer workflow than relying on a single archive.
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