If you are in search of the top PST to TGZ converter to export emails of Outlook to Zimbra, EmailSoftwares Outlook to Zimbra Converter is the best solution. It converts both ANSI and UNICODE PST files into Zimbra TGZ format without Outlook or Zimbra installed on your system. It supports large PST files, maintains the folder hierarchy, and retains all email properties, attachments, and metadata. With an easy-to-use interface, it's ideal for both non-technical and technical users. It also comes with a free trial to test its features before upgrading to the full version for unlimited conversion.