From your old mail app to Outlook

MBOX is one of the oldest and most widely used formats for storing email. A single .mbox file holds many messages one after another, each with its headers, body and attachments. Gmail, Thunderbird, Apple Mail, Yahoo, mutt, Evolution and many other tools can export or already store mail this way.

• Gmail (Google Takeout): upload All mail Including Spam and Trash.mbox from the Takeout/Mail folder, or the Takeout .zip or .tgz itself.
• Thunderbird: upload the extension-less files in your profile’s Mail or ImapMail folders (for example Inbox, Sent). Drop the whole folder and we skip the .msf index files for you.
• Apple Mail: upload the .mbox folders created by Export Mailbox…. Each one contains a file named mbox; we name the result after the folder.
• Other apps: any file in standard mbox format works, whatever its extension.
• Outlook: .pst files from Outlook for Windows and .olm archives from Outlook for Mac can be converted too, for example OLM to PST or PST to MBOX.

You can add several mailboxes to one conversion; they all end up in a single PST file. Zip and tar archives (including .tgz) can be uploaded without extracting them. Want something other than a PST? See all conversions.