I recently switched from using Microsoft Outlook to Zimbra, and I need to move all my old emails stored in a PST file into TGZ format so that I can import them into Zimbra. I tried using the manual method by exporting emails and then compressing them, but it did not work properly — some folders and attachments are missing. Can anyone suggest a reliable way to convert PST to TGZ without losing any data? Is there any safe tool or method that can help with this conversion?