IMAP Migrator
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PST and MBOX files

Import an Outlook .pst or an .mbox (Thunderbird, Apple Mail, Google Takeout) into any IMAP mailbox, or download a mailbox as MBOX. Progress shows in your console.

1. Upload the file

2. Where should the mail go?

Often an app password (Gmail, iCloud, Yahoo, Microsoft with 2FA).
Leave empty to merge with the existing folders: Inbox into Inbox, Sent into Sent.
Messages already in the mailbox are skipped, so a second run does not duplicate anything.

Mailbox to download

Every folder becomes one .mbox file inside a ZIP. Open them with Thunderbird (ImportExportTools NG), Apple Mail or import them here into another mailbox. The ZIP can be downloaded for 24 hours, then it is deleted.

Download calendars and contacts

Every calendar becomes a folder of .ics files and every address book a folder of .vcf files, inside one ZIP. Works with CalDAV/CardDAV servers, Google, Microsoft 365 and Exchange.