PST to MBOX Converter: Safest Ways to Export Outlook Emails in Minutes

The safest and fastest way to convert PST to MBOX is to use a reputable offline converter that preserves folder hierarchy, metadata, and attachments while supporting batch jobs for large mailboxes. Manual methods work but are slower, multi-step, and risk partial transfers, especially with big PSTs.
Quick safe methods
• Use a trusted desktop tool to load PST, choose MBOX, and export in a few clicks; quality tools maintain structure, handle attachments, and support bulk conversion for speed.
• Outlook add-ins like MessageSave can directly export folders to MBOX, creating one MBOX per Outlook folder for clean imports into Thunderbird/Apple Mail.
Manual routes (free)
• IMAP bridge: Import PST into Outlook, sync to an IMAP account, then export to MBOX from Thunderbird or Apple Mail; effective but time-consuming and fragile at scale.
• Apple Mail/Thunderbird paths: Set up the account, sync fully, then use Export Mailbox (Apple Mail) or ImportExportTools NG in Thunderbird to save as MBOX.
Best practices
• Prefer offline tools over online converters to protect sensitive data and avoid size/time limits.
• Split oversized PSTs, keep folder names short, and avoid special characters to prevent MBOX import issues in some clients.
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