News, updates, and ideas from the team behind Mbox Viewer — the native Mac and Windows app for opening MBOX and EML email archives.https://mboxviewerpro.com/enhttps://mboxviewerpro.com/blog/double-click-mbox-file-does-nothing/https://mboxviewerpro.com/blog/double-click-mbox-file-does-nothing/Double-clicking a .mbox file does nothing on Windows, and on a Mac it hands the file to Apple Mail, which tries to import it. Here is why neither system knows what to do with your mailbox, and how to fix it in a minute.Thu, 03 Sep 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/how-do-you-work-with-an-mbox-file/https://mboxviewerpro.com/blog/how-do-you-work-with-an-mbox-file/You asked Google for your data, waited days, and got a file you cannot open. Here is what to actually do with an MBOX file: read it, search it, pull messages out of it, and keep it somewhere it will survive.Tue, 01 Sep 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/eudora-the-email-client-and-its-mbx-files/https://mboxviewerpro.com/blog/eudora-the-email-client-and-its-mbx-files/Steve Dorner wrote it in 1988 and named it after a short story. Qualcomm sold it to eighteen million people. It died in 2006, and in 2018 the Computer History Museum published its source code under a BSD licence. If you still have a Eudora folder on an old disk, its mail is in mbox — and it opens today.Mon, 31 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/what-is-an-mbox-file/https://mboxviewerpro.com/blog/what-is-an-mbox-file/An MBOX file is a plain-text file holding many email messages one after another, each starting with a line that begins "From ". It is what Google Takeout hands you when you export Gmail — and what Thunderbird and Apple Mail keep your mail in.Sun, 30 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/what-is-inside-your-google-takeout/https://mboxviewerpro.com/blog/what-is-inside-your-google-takeout/Ten ZIP files of twenty gigabytes each, and no idea what is in them. Takeout Reports opens a Google Takeout archive and reports what it holds — how many messages, how many photos, which years, which services came back empty — without unzipping it and without touching the network.Fri, 28 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/mbox-viewer-for-schools-and-organizations/https://mboxviewerpro.com/blog/mbox-viewer-for-schools-and-organizations/Apple School Manager buys apps, not in-app purchases. That is why Mbox Viewer Pro for Education exists: a Custom App that arrives unlocked, bought by the seat and deployed by MDM.Wed, 26 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/how-to-split-large-thunderbird-mbox-files/https://mboxviewerpro.com/blog/how-to-split-large-thunderbird-mbox-files/A Thunderbird folder is a single mbox file, and after fifteen years it can weigh more than the disk it started on. Here is how to cut one into smaller mailboxes — with Mbox Viewer or with mboxShell, our open-source terminal tool — and, more importantly, how to prove afterwards that not a single message was lost.Tue, 25 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-8-4-and-2-8-5-windows/https://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-8-4-and-2-8-5-windows/Two updates in two days on the Microsoft Store: 2.8.4 exports your selection as a new MBOX and doubles the free plan to 1 GB; 2.8.5 fixes printing, which had been leaving out the subject, the date and the sender since the very first version.Mon, 24 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-8-4-mac/https://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-8-4-mac/Version 2.8.4 exports your selection as a brand-new MBOX, doubles the free plan to 1 GB and brings an edition for schools and universities. On the Mac App Store since 23 August.Sun, 23 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-8-2/https://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-8-2/Version 2.8.2 for Mac and Windows is all about merging mailboxes: Apple Mail exports are traceable again, the merge finally tells you what it is doing, and the toolbar explains itself. Still strictly read-only.Fri, 07 Aug 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-7-0/https://mboxviewerpro.com/blog/whats-new-in-mbox-viewer-2-7-0/Mbox Viewer 2.7.0 is a big reliability, privacy, accessibility and speed update — faster on large mailboxes, stronger tracking-pixel blocking, full VoiceOver and keyboard support, and rock-solid handling of huge or malformed files. Still strictly read-only.Fri, 03 Jul 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/email-formats-history-and-anatomy/https://mboxviewerpro.com/blog/email-formats-history-and-anatomy/How email is actually stored on disk — MBOX, Maildir, EML, PST, OST, OLM, MSG, NSF and historical formats like Eudora. Their history, how they're built, what each one is good for, and a side-by-side comparison.Thu, 18 Jun 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/email-archive-formats-explained/https://mboxviewerpro.com/blog/email-archive-formats-explained/What's actually inside an email archive? A plain-language tour of the four formats you'll meet — MBOX, EML, PST and OLM — and how to read each one on a Mac.Thu, 11 Jun 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/read-old-email-archives-on-modern-mac/https://mboxviewerpro.com/blog/read-old-email-archives-on-modern-mac/That backup from Eudora, Entourage, Netscape or PowerMail is probably standard mbox — which means a modern Mac can still read it. Here's how to find out and open it safely.Thu, 11 Jun 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/why-back-up-your-gmail/https://mboxviewerpro.com/blog/why-back-up-your-gmail/Cloud email is convenient until it isn't. Here's why keeping a local Gmail backup matters — account lockouts, accidental deletion, leaving providers — and how Mbox Viewer makes that archive usable.Tue, 26 May 2026 00:00:00 GMThttps://mboxviewerpro.com/blog/introducing-mbox-viewer/https://mboxviewerpro.com/blog/introducing-mbox-viewer/Why we built Mbox Viewer — a native macOS app that opens MBOX and EML files of any size with streaming performance, total privacy, and no Electron or Java in sight.Wed, 20 May 2026 00:00:00 GMT