MailFundus Archive

Email backup, search & cleanup

Only for Mac

Free · In‑App Purchases

Mac

Mailbox full? MailFundus backs up every email to your Mac, verifies it, then frees up space. Free for up to 500 messages, full version with no subscription. Mailbox full, Mail getting sluggish, and you don't dare delete anything? MailFundus Archive backs up your Apple Mail mailboxes into an archive of their own on your Mac: verified byte for byte, searchable. Only when everything is provably backed up does the app clean up in Mail – only verified messages, only after you confirm, only into Mail's Trash. Download free: the free version backs up to 500 messages with every feature. The full version removes the limit as a one-time in-app purchase. For businesses there is MailFundus Pro, a subscription – free for the first 14 days. THREE PROMISES • Keep everything. Every message is stored, read back and compared byte for byte with the original. Nothing is lost, nothing is converted. • Find it instantly. Full-text search across all messages and attachments, including PDFs – every search under 60 ms, measured on 76,000 messages. • Empty mailbox. Whatever is backed up and verified, MailFundus Archive moves to Mail's Trash after you confirm. You empty it yourself. HOW IT WORKS 1. Select: mailboxes with count and size, optionally only mail older than a limit you set. 2. Back up and verify: byte-for-byte comparison, sample restore. Mail is not touched. 3. Delete from Mail: you confirm, the app moves exactly the verified messages to Mail's Trash and checks each one again right before. 4. Find it again: search, read, open attachments, "Restore to Mail" as .mbox or .eml. STRAIGHT TALK • Only verified messages are deleted, only after you confirm, never permanently. • The app only reads Mail's folder. macOS asks for folder access and for permission to control Mail; the app explains both when they come up. • No lock-in: any message can be exported as .eml or .mbox. The archive lives on your disk, and Time Machine backs it up. FOR BUSINESSES: MAILFUNDUS PRO • Scheduled automation – hourly, daily or weekdays, also directly from the mail server (IMAP), with a gap report • Seal chain: any later change to the archive is detected; second copy in another location • Retention periods per account or mailbox, deletion run with a log, private mailboxes • Auditor access and auditor export with checksums • Procedural documentation generated from your settings • One archive Mac writes, other Macs read along MailFundus Pro supports GoBD-compliant email archiving (German record-keeping rules) when set up and used properly; organizational measures remain the company's responsibility. PRICING • Free: up to 500 messages, every feature. • Full version: any number of messages, one-time purchase, no subscription. • MailFundus Pro: subscription including the full version and all business features, annual or monthly, valid on all Macs with your Apple Account. New subscribers try it free for 14 days. It renews automatically unless cancelled at least 24 hours before the end of the trial or period; cancel any time in your Apple Account settings. • Always free: whatever is in the archive stays readable, searchable and exportable without a purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mailfundus.com/privacy.html REQUIREMENTS macOS 15 or later, Apple Mail with locally stored messages. No sign-in, no data collection; everything stays on your Mac. IMAP passwords (Pro) stay in the keychain.

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New: rate MailFundus right from the Help menu. Setup now explains more clearly that nothing is moved or deleted without your OK.

The developer, Coolblack GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    Coolblack GmbH
    Size
    4.7 MB
    Category
    Productivity
    Compatibility
    Requires macOS 15.0 or later.
    • Mac
      Requires macOS 15.0 or later.
    Languages
    English and German
    Age Rating
    4+
    In-App Purchases
    Yes
    • MailFundus Pro Monthly $12.99
    • MailFundus Pro Annual $129.00
    • Full Version $24.99
    Copyright
    © 2026 Coolblack GmbH