7 MailStore Alternatives (Home & Server, 2026)

The right MailStore alternative depends on which MailStore you're replacing. MailStore Home is a free Windows program that pulls a copy of your personal mailbox into a searchable archive on your own PC. MailStore Server is the paid business product: per-user licences, journaling, retention policies, legal hold, and an audit log, sold to companies that have to keep email for compliance. (There's also a hosted MailStore Cloud, launched in October 2025, and a service-provider edition.) People leave the two for different reasons, and the aggregator lists that rank for this search mix them up, dropping antivirus and remote-management tools into the same list as email archivers. This post is split by job.

Disclosure up front: InboxBucket is our product, and it's first because it does the MailStore Home job (an automatic copy of new mail, kept where you control it) without a Windows PC that has to be on. It is not a compliance archive, and we say so wherever that matters below.

What MailStore actually is (and no, Home isn't discontinued)

Search for a "MailStore Home replacement" and you'll find people assuming the free version has been abandoned. It hasn't. MailStore Home is still free for private use, still runs on Windows 10 and 11, and version 26.3 shipped in July 2026 according to the changelog. What did change is the ownership. MailStore Software GmbH, based in Viersen, Germany, was bought by Carbonite in 2014 and has been part of OpenText since December 2019; in April 2026 the familiar orange logo became a blue "MailStore by OpenText" one, which is where most of the "is it dead?" confusion comes from. Along the way, support for Windows 7 and 8.1 was dropped in 2023 and Windows Live Mail in 2025. MailStore says more than a million people use Home.

MailStore Server is a different animal. It's a perpetual licence per archived user, sold as a starter kit of five users with a year of updates and support from €295 excluding VAT (around $259 on the US version of the page), with a five-user minimum and annual update-and-support renewals after that. Let support lapse and an upgrade costs 70 percent of list price. It runs on Windows only, archives from Exchange, Microsoft 365, Google Workspace, IMAP, and PST files, and does the compliance work: journaling, retention policies, legal hold, an audit log, and GDPR certification. Capterra reviewers rate it 4.5 out of 5. MailStore Cloud is the hosted version, run from a Frankfurt data centre on a monthly subscription sold through resellers, at roughly €4.50 per user per month.

Why people leave

MailStore Home users, going by the help pages, forum threads, and reviews:

• It's Windows-only. There is no Mac or Linux build and never has been, and the help site's installation page now lists only Windows 11.
• It doesn't run itself. Home has no scheduler. You open it and click Run on each archiving profile, or use a desktop shortcut that does the same; MailStore's own staff confirmed that automated archiving "is not available in MailStore Home." The Task Scheduler workaround that circulates in forums is unofficial, and people report it silently doing nothing.
• Private use only. The freeware licence restricts it to "private purposes only," explicitly excludes "archiving business e-mail correspondence," and forbids archiving shared or pool accounts. A freelancer archiving client mail is outside the terms.
• The archive lives on one PC, in a database. It's a Firebird database on your local drive. MailStore tells you never to sync the archive folder with Dropbox and that file-hosting services are not suitable for backing it up because they can corrupt it, so the archive itself needs its own separate backup. In January 2025 a mandatory Firebird 4 migration meant existing archives couldn't be opened in version 25.1 until converted.
• No official support. Home users get the help site and a community forum.

MailStore Server admins mostly cite cost and platform: per-user licensing with the five-seat minimum and yearly renewals ("in case of large amount of users the cost can be relevant," as one reviewer puts it), Windows-only, the vendor's stated preference for on-premises hardware over public-cloud VMs, and operational grind. Reviewers on Capterra mention slow reindexing of large archives, no alerts for failed jobs, and a service that needed a manual restart after reboots. Nothing in MailStore writes to object storage like S3, and the SQL Server and PostgreSQL storage options are being phased out.

If none of that applies to you, MailStore is a well-regarded product and you don't need this list. If it does, here's what to use instead.

1. InboxBucket: automatic backup to storage you own

Replaces: MailStore Home's real job, an ongoing copy of everything that arrives, without a PC that has to be on.

InboxBucket gives you a private inbound address. You auto-forward your mailbox to it, and every message is saved as an original .eml file, headers and attachments intact, into your own Google Drive, OneDrive, Dropbox, or S3 bucket, including EU-hosted S3-compatible storage like Hetzner if data residency matters to you. Compared with MailStore Home:

• It runs without you. Forwarding happens on the mail server. Nothing to open, no Run button, no Windows machine that has to stay awake.
• The copy is off-machine from the start. It lands in cloud storage you already back up (or that is the backup), not a database on the same disk as everything else.
• Open files, no database. Each message is a standard .eml you can open in any mail client or a browser viewer, with no proprietary store to migrate when a vendor changes database engines.
• Any OS, any mailbox that can forward. Gmail, Outlook.com, and iCloud forward for free; Yahoo needs its paid plan; Microsoft 365 blocks external forwarding until an admin allows it. Nothing is installed anywhere.
• No inbox access. MailStore Home stores your account credentials so it can log in and pull mail. InboxBucket never asks for a mailbox password or an OAuth grant; it only ever sees what you forward.
• Free for 100 emails a month, then a one-time $79 for unlimited. No renewal.

The catch: forwarding starts today. MailStore Home can ingest twenty years of history from a PST file or an IMAP account; InboxBucket can't. Pair it with a one-time export (options 2 and 3 cover that, and so does Google Takeout for Gmail). And it is not a compliance archive: there's no legal hold, retention policy, or audit log, so it isn't a MailStore Server replacement for anyone with regulatory retention duties.

2. Thunderbird: a free local archive on Windows, Mac, or Linux

Replaces: MailStore Home as a free, searchable local copy, especially on a Mac or Linux.

Point Thunderbird at your account over IMAP, turn on offline storage for every folder, and you have a full local copy of the mailbox in MBOX files: searchable, free, and on any desktop OS. For an export you can move around, the ImportExportTools NG add-on writes folders out as MBOX or as individual .eml files.

The catch: it's a mail client, not an archiver. The copy only updates while Thunderbird is running, its Archive feature is manual only, the built-in profile export fails past about 2 GB, and if offline storage is off, a profile backup captures headers only. The Thunderbird backup guide walks through the settings that matter.

3. MailShelf Pro or Mail Backup X: desktop archivers with a scheduler

Replaces: MailStore Home like for like, with the scheduler Home lacks.

If what you liked about MailStore Home was a dedicated archiver on your desktop, these two are the nearest paid equivalents. MailShelf Pro (zebNet, Windows) archives from Microsoft 365, Exchange, Google Workspace, IMAP, POP3, Outlook, Thunderbird, PST, and MBOX on a schedule; a single-user licence is $43.99 with a year of updates (zebNet raised prices in September 2026). Mail Backup X (InventPure) runs on macOS as well as Windows, backs up Gmail, IMAP, Exchange, Outlook, Apple Mail, and Thunderbird to a local folder, USB drive, Google Drive, OneDrive, Dropbox, or FTP, and exports EML, PST, MBOX, and OLM. Its personal licence lists at $79 one-time for two computers with a year of updates, then $20 a year if you want further updates.

The catch: both keep the archive in their own store on your machine, so you're back to backing up the backup, and both charge for updates after the first year. MailShelf Pro is Windows-only; Mail Backup X is the one to look at on a Mac.

4. eM Client: a mail client that archives on its own

Replaces: MailStore Home for someone who'd rather have archiving built into the mail client they use every day.

eM Client (Windows and macOS) is free for personal use with up to two accounts; the Personal licence is €39.95 a year or €59.95 one-time. Its Automatic Archiving moves messages older than a set number of days into local folders without you doing anything, and it can export mail as .eml.

The catch: read the fine print on archiving. eM Client's support article says archived messages "will be removed from the server as well." That's a move, not a copy: it frees up your mailbox, but afterwards the only version lives in eM Client. Back that folder up somewhere else, or use it alongside a forwarding archive rather than instead of one.

5. piler: open-source compliance archiving you host yourself

Replaces: MailStore Server, for a team with a Linux admin and no appetite for per-user licences.

piler is a GPL-licensed email archive that takes a journaled copy of every message over SMTP from Exchange, Microsoft 365, Google Workspace, or any mail server, and gives you full-text search, retention rules, legal hold, and an audit trail through a web interface. It runs on Linux or in Docker, and version 1.4.9 shipped in June 2026. The software is free; Piler Enterprise adds support and starts at €400 for the first year (€150 on renewal) for up to ten users.

The catch: you run it. The server, updates, backups, and the journaling setup are yours, and there's no Windows build or Outlook add-in.

6. MailArchiva: the closest like-for-like Server replacement

Replaces: MailStore Server, especially if you want Linux or a hosted option from the same vendor.

MailArchiva is the same category of product as MailStore Server (journaled and mailbox archiving, retention, legal hold, search) but runs on Windows or Linux. Up to nine mailboxes it's free. On-premises licences are perpetual, from $32.05 per mailbox at 10 to 24 mailboxes (falling to $11.38 at a thousand or more) plus 20 percent for first-year support; the cloud edition is $62.40 per mailbox per year at small sizes, with a ten-mailbox minimum.

The catch: it needs the same care and feeding as MailStore. You're changing vendors, not approaches.

If you'd rather buy a hosted compliance archive with a contract and an SLA, that market is ArcTitan ($4 per user per month, or $48 a year, per its own comparison page), Barracuda Cloud Archiving, Jatheon, Mimecast Cloud Archive, and Proofpoint Archive; all but ArcTitan are quote-only. Those are MailStore Server's real competitors in regulated industries, and well out of scope for a personal user.

7. Google Vault or Microsoft 365 retention: the archive you may already pay for

Replaces: MailStore Server's retention and legal-hold role, for organisations on Google Workspace or Microsoft 365. No alternatives list mentions these, and for a lot of small businesses they're the answer.

Google Vault is included in Workspace Business Plus, Enterprise, and Education plans (not Business Starter or Standard) and provides retention rules, holds, search, and export to PST or MBOX. In Microsoft 365, retention policies, litigation hold, and eDiscovery come with Business Premium or E3 (E5 for the premium eDiscovery tier), and every licensed mailbox can have an archive mailbox that grows to 1.5 TB. Under the July 2026 list prices, Business Premium is $22 per user per month and E3 is $39.

The catch: Google says outright that Vault "isn't designed to be a backup or archive tool": it governs data inside Workspace and goes away with the account. Microsoft's retention is the same story, and Microsoft explicitly doesn't permit journaling or forwarding rules that copy mail into an archive mailbox. For a copy that exists outside the tenant, read what Microsoft 365 actually keeps and pair the built-ins with an external copy.

Getting your mail out of MailStore first

None of the alternative lists mention this, and it's the step that matters: don't uninstall MailStore until the archive is out in an open format. MailStore Home's export profiles can write the archive to:

• A folder on disk, as individual .eml files (or Outlook .msg files). This is the portable choice: .eml opens in every mail client and in a browser viewer, and a folder of .eml files converts to a single MBOX for importing into Thunderbird. If you picked .msg, convert to .eml first.
• An IMAP, Exchange, or Gmail mailbox, which pushes the archive back into a live account, and from there into any forwarding-based backup.
• An SMTP address, which mails each message out one at a time. MailStore notes this is the only route back into a POP3 account.

Export folder by folder for large archives, put the .eml copy somewhere durable, and only then remove the program. The archive folder itself is a Firebird database that nothing but MailStore can read.

Side by side

Prices checked 30 September 2026 against each vendor's pricing page; they change, so verify before buying.

The honest recommendation

Leaving MailStore Home: keep the history and automate the future. Export the existing archive to .eml (above), put that folder in your cloud storage, then set up a forwarding archive like InboxBucket so new mail lands in the same storage without a PC in the loop; add Thunderbird if you also want a searchable local copy. If you specifically want a Home-style desktop archiver that handles the ongoing part too, MailShelf Pro on Windows or Mail Backup X on a Mac is that product, at a price.

Leaving MailStore Server: be honest about why. If it's Windows or cost, MailArchiva and piler are the same kind of tool on your terms, and Vault or Microsoft 365 retention may already be paid for. If you have real retention obligations, none of the personal options above, InboxBucket included, replace legal hold and an audit log, and MailStore Server is a well-reviewed product. Keep the compliance archive in the tenant or on the server, and add an external copy for the disaster case. For a broader look at the categories, see email backup methods compared.

FAQ

Is MailStore Home discontinued?

No. MailStore Home is still free for private use, still supported on Windows, and version 26.3 was released in July 2026. MailStore has been part of OpenText since December 2019 and rebranded to "MailStore by OpenText" in April 2026, which is where the confusion comes from. What has been dropped is support for Windows 7 and 8.1 (2023) and for Windows Live Mail (2025).

Is MailStore Home really free?

Yes, for private use. The licence terms restrict it to personal email and explicitly exclude archiving business correspondence or shared mailboxes. Business use requires MailStore Server, which starts at €295 for a five-user starter kit with a year of updates and support.

Does MailStore run on a Mac?

No. MailStore Home and MailStore Server are Windows-only, and there has never been a macOS or Linux version. On a Mac, Thunderbird (free) or Mail Backup X (paid) do the local-archive job, and a forwarding archive like InboxBucket runs server-side on any platform.

Can MailStore Home archive automatically on a schedule?

Not by itself. Scheduled archiving is a MailStore Server feature; Home only offers a Run button and a desktop shortcut that starts one profile. Windows Task Scheduler workarounds circulate online but are unsupported. If you want an archive that updates without you, use an archiver with a scheduler such as MailShelf Pro, or a server-side option such as InboxBucket.

How do I export my MailStore Home archive?

Create an export profile and choose Directory (File System) to write every message as a .eml or .msg file, or export straight into an IMAP, Exchange, or Gmail mailbox. The .eml route is the portable one: the files open anywhere and convert to MBOX for Thunderbird.

What is the difference between MailStore Home and MailStore Server?

Home is free, single-user, for private use only, run by hand, and Windows-desktop only. Server is the licensed business product: per-user pricing from a five-user starter kit, scheduled archiving, journaling, retention policies, legal hold, audit logging, an Outlook add-in and web access, and up to 2,000 users per installation. MailStore Cloud is the hosted version of Server.