MBox Office overview

MBox Office opens Gmail exports from Google Takeout, Thunderbird mailboxes, Apple Mail exports, or any large MBOX archive on your Mac. Start browsing while headers are discovered, search the archive, recover attachments, export messages, or put useful mail back in a new account.

Built for Large MBOX Files

MBox Office progressively reads mailbox headers instead of loading the complete archive into memory. The first messages appear while discovery continues. If a long scan is interrupted, MBox Office can resume from its last safe position.

Find the One Email

Search by sender, recipient, subject, date, attachment, Gmail label, folder, or message text. Choose basic header search for a quick pass or build a content index when you need to search inside messages.

Recover What Matters

Read plain text and sanitized HTML email
Open, save, or bulk-extract attachments
Export selected messages or the whole mailbox as standard EML
Export unique sender and recipient contacts as one vCard (VCF) file
Split a large MBOX by size, year, or mailbox label
Add EML messages to an archive safely
Print messages and open several archives in separate windows

Private on Your Mac

Opening, indexing, searching, splitting, and exporting stay on your Mac. No account is required, and there is no subscription. Scripts and unsafe embedded content are removed, JavaScript is disabled, and remote images remain blocked until you choose to load them.

Works with the Archives You Already Have

Gmail and Google Takeout MBOX exports, including Gmail labels
Thunderbird and other standard MBOX exports
Apple Mail .mbox export packages
.mbox and .mbx files
Common MBOX variants, line endings, and legacy text encodings

Restore When You Need It

Restore selected messages or the complete archive to a standard IMAP mailbox over verified TLS. Choose or create a destination mailbox, follow progress, and review individual failures. Saved passwords are protected by the macOS Keychain. Some providers require an app-specific password.

MBox Office is for old backups, email migration, account recovery, project archives, and anyone who wants to make a large MBOX useful again.

What's new in version 2.0.0

MBox Office 2.0 is a complete native Mac rewrite built for large, real-world mail archives.

Features

Open Gmail Takeout, Thunderbird, Apple Mail, .mbox, and .mbx archives
Start browsing while mailbox headers are discovered progressively
Resume large-file indexing instead of restarting
Choose Off, Basic, or Content Search for the right large-mailbox workload
Search senders, recipients, subjects, dates, attachments, labels, and text
Filter with Gmail Takeout labels and common mailbox folder headers
Export selected messages or the complete archive as EML
Export unique sender and recipient contacts as one vCard (VCF) file
Open, save, or bulk-extract attachments
Split mailboxes by target size, year, or mailbox label
Restore selected messages or the complete archive to IMAP over verified TLS
Choose or create the destination mailbox and review per-message failures
Store remembered IMAP passwords in the macOS Keychain
Read sanitized HTML with privacy-controlled remote images
Print messages, copy sender addresses, and open multiple archives

MBox Office for Mac