ViceVersa Tools Opens 12 Ways to Recover Mail Trapped in an Outlook OST File

NEW DELHI, India — September 2, 2026 — ViceVersa Tools, a developer of Windows desktop software for email and document conversion, announced today the release of its Outlook OST category, a set of twelve tools built to pull mail out of an OST file when the matching PST or live Outlook profile isn't available. An OST file is a local, offline copy of a mailbox that Outlook maintains on its own, and it isn't meant to be opened or read outside of Outlook, which makes recovering mail from it after account loss or a system change a common problem with few direct solutions. Every tool in this category works in one direction, extracting mail out of the OST file rather than writing back into it.

The twelve tools in the category extract OST mail into the following destinations:

• OST to EML — a widely supported message format most mail clients can open directly
• OST to EMLX — the format used by Apple Mail
• OST to MSG — Microsoft Outlook's single message format
• OST to MBOX — the mailbox format used by Thunderbird and several other clients
• OST to PST — a standard Outlook mailbox file that can be reattached to a working profile
• OST to NSF — the mailbox format used by IBM and HCL Notes
• OST to TGZ — a compressed archive package
• OST to HTML — browsable web pages, one per message or folder
• OST to MHTML — single file web archives that keep formatting and images together
• OST to PDF — printable, archivable documents
• OST to IMAP — a live IMAP mailbox on any provider
• OST to Office 365 — a live Microsoft 365 account

Each tool reads the OST file directly and does not require the original Exchange or Outlook account it was created under to still be active.

"An OST file usually only becomes a problem after the account behind it is already gone, so there's rarely a clean way to get at it," said a ViceVersa Tools spokesperson. "These twelve tools read the file on its own terms and put the mail wherever it actually needs to end up next, whether that's a working PST, a live mailbox, or just a readable archive."

The Outlook OST category joins the rest of the ViceVersa Tools catalog, which includes Mailbox Pairs, IMAP, and Office 365 conversion, one way export from Thunderbird, archive converters for HTML, MHTML, and PDF, a contacts category, and a small set of utilities. All twelve tools are available now as free trial downloads at viceversatools.com, with full licenses available from each product's page.

About ViceVersa Tools

ViceVersa Tools makes Windows software for the moments when mail ends up stuck in a format it wasn't meant to leave. Its 98 product lineup covers Mailbox Pairs, IMAP, and Office 365 conversion, Thunderbird export, HTML, MHTML, and PDF archiving, contact tools, and a short list of utilities, alongside the Outlook OST extraction tools above.

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Website: https://www.viceversatools.com