How to Download Email From Outlook: A Complete Guide

Whether you're backing up important messages, migrating to a new device, or archiving old correspondence, downloading email from Outlook is a task most users will need to tackle at some point. The good news is that Outlook offers several built-in methods — but the right approach depends heavily on your setup, version, and what you actually want to do with those emails afterward.

What "Downloading" Email From Outlook Actually Means

The term "download" covers a few different operations in Outlook:

• Exporting to a local file (most common for backups and archives)
• Downloading offline copies of cloud-synced email to your local machine
• Saving individual emails as standalone files
• Printing to PDF as a lightweight archive method

These aren't interchangeable. Exporting an entire mailbox creates a structured data file. Saving a single email creates a document. Understanding which outcome you need determines which method to use.

Method 1: Export Your Mailbox Using the .PST Format

The most thorough way to download email from Outlook — especially from the desktop application — is exporting to a .PST file (Personal Storage Table). This is a proprietary Microsoft format that stores emails, contacts, calendar items, and attachments in a single portable file.

To export to .PST in Outlook desktop (Windows):

1. Go to File → Open & Export → Import/Export
2. Select Export to a file, then click Next
3. Choose Outlook Data File (.pst)
4. Select the folder or mailbox you want to export (check Include subfolders to capture everything)
5. Choose a save location and click Finish

You can optionally add a password to the .PST file for security. The resulting file can be re-imported into any Outlook desktop installation, making it useful for migrations and full backups.

Mac users note: Outlook for Mac uses .OLM files rather than .PST. The export path is similar — File → Export — but the resulting file format is different and not directly cross-compatible with Windows Outlook without conversion.

Method 2: Save Individual Emails as Files 📧

If you only need specific messages rather than an entire mailbox, you can save individual emails in several formats:

• .MSG — Outlook's native single-message format; retains formatting and attachments; reopens in Outlook
• .EML — A more universal format compatible with many email clients
• .HTML or .MHT — Saves the email as a webpage; readable in browsers
• .TXT — Plain text only; strips formatting and may lose embedded images
• PDF (via Print) — Good for read-only archiving; not easily searchable at scale

To save an email as .MSG or .EML on desktop, you typically drag the message from Outlook to a folder on your desktop or file explorer. To save as PDF, use File → Print → Microsoft Print to PDF (Windows) or the standard print dialog on Mac.

Method 3: Downloading Emails for Offline Access

If you're using Outlook with an Exchange or Microsoft 365 account, your email may normally live on a server and sync on demand. You can configure Outlook to cache a copy locally so your messages remain accessible without internet.

In Outlook desktop:

• Go to File → Account Settings → Account Settings
• Select your account and click Change
• Toggle Use Cached Exchange Mode on
• Adjust the Mail to keep offline slider (ranging from a few weeks to "All")

This doesn't export email — it keeps a synchronized local copy inside an OST file (Offline Storage Table), which Outlook manages automatically. OST files aren't directly portable like PST files, but they do ensure local access.

Method 4: Outlook on the Web (OWA) and Microsoft 365

If you're using Outlook in a browser (outlook.com or the Microsoft 365 web app), your options are more limited. The web version doesn't have a native full-mailbox export feature available to standard users.

For Microsoft 365 business accounts, IT administrators can use the eDiscovery and Content Search tools in the Microsoft Purview compliance portal to export mailboxes — but that's typically outside individual user control.

Variables That Affect Which Method Works for You

No single method suits every situation. The factors that shape your best approach include:

• Outlook version: Desktop (Windows or Mac), web browser, or mobile app — each has different export capabilities
• Account type: Personal (IMAP/POP3), Exchange, or Microsoft 365 — affects what's synced locally vs. server-side only
• Volume of email: Archiving 500 messages is different from exporting a 20GB mailbox
• Destination: Re-importing into Outlook later vs. long-term read-only archiving vs. switching to a different email client
• Technical access: Consumer accounts vs. enterprise accounts (where IT policies may restrict exports)
• Operating system: PST export is Windows-only natively; Mac Outlook uses OLM; mobile apps don't support mailbox exports

Understanding File Size and Storage Implications 💾

PST and OLM files can grow large quickly — especially if your mailbox contains years of emails with attachments. A single PST file can technically grow to 50GB or more, though Microsoft recommends keeping them under 10GB for performance reasons. If you're exporting a large mailbox, plan for sufficient local storage and consider splitting exports by folder or date range.

When the Right Approach Depends on Your Specific Setup

The mechanics of exporting from Outlook are straightforward once you know your version and account type. But whether to export the full mailbox or selected folders, whether to use PST or save individual messages, and how to store or use those files afterward — those answers shift depending on what you're actually trying to accomplish, how much email you have, and where it needs to end up. Your specific combination of Outlook version, account type, and end goal is what determines the path that makes most sense for you.