How to Delete All Emails From Outlook: A Complete Guide

Clearing out a cluttered Outlook inbox can feel like a big task — especially when you're staring down hundreds or thousands of emails. Whether you're doing a full inbox reset, cleaning up an old account, or just trying to reclaim some storage space, Outlook gives you several ways to delete emails in bulk. The right approach depends on which version of Outlook you're using and exactly what you want to delete.

Understanding What "Delete All" Actually Means in Outlook

Before diving into the steps, it's worth knowing what happens when you delete emails in Outlook. Deleted messages don't disappear immediately — they move to the Deleted Items folder (or Trash, depending on your setup). From there, they sit until you empty that folder manually or until your account's auto-purge schedule runs.

If you're using a Microsoft 365 or Exchange account, your administrator may also have retention policies that affect how long deleted emails are actually recoverable. For personal accounts like Outlook.com or Hotmail, deleted items typically stay recoverable for up to 30 days.

This matters because "deleting all emails" can mean:

• Moving everything to Deleted Items
• Permanently emptying Deleted Items
• Both steps in sequence

How to Delete All Emails in Outlook on Desktop (Windows/Mac)

Select All and Delete in a Folder

This is the most straightforward method for the Outlook desktop app:

1. Click the folder you want to clear (e.g., Inbox)
2. Click on any email in the list
3. Press Ctrl + A (Windows) or Cmd + A (Mac) to select all messages
4. Press the Delete key

All selected emails move to Deleted Items. This works across most versions of the Outlook desktop app, including those bundled with Microsoft 365.

Using the "Empty Folder" Option

For folders like Deleted Items or Junk Email, Outlook offers a faster built-in shortcut:

1. Right-click the folder in the left sidebar
2. Select Empty Folder or Delete All

This permanently removes everything in that folder, skipping the "move to Deleted Items" step. Use this when you're confident you don't need anything in that folder.

Sorting to Target Specific Emails First

If you don't want to delete everything — just a large chunk — sorting can help you work smarter:

• Sort by sender to select all emails from a specific address
• Sort by date to grab everything older than a certain point
• Sort by size to target large emails eating up storage

Click the column header in the email list to sort. Then hold Shift and click the first and last email in a range to select all emails between them, or hold Ctrl (Windows) to select individual emails manually.

How to Delete All Emails in Outlook on the Web (Outlook.com)

The web version of Outlook has a slightly different interface but supports bulk deletion:

1. Open the folder you want to clear
2. Check the checkbox at the top of the email list — this selects all visible emails
3. A prompt may appear asking if you want to select all messages in the folder (not just the ones currently loaded) — confirm this
4. Click Delete

This method ensures you're deleting everything, not just the emails loaded on screen. The web app often only loads emails in batches, so confirming "select all" is an important step many users miss. 🗑️

How to Delete All Emails in the Outlook Mobile App

On iOS and Android, bulk deletion works like this:

1. Long-press on one email to enter selection mode
2. Tap the circle/checkbox at the top to select all
3. Tap the trash icon

The mobile app may not always offer a true "select all across the entire folder" option in older versions — it sometimes only selects what's currently loaded. If you need to delete thousands of emails, the desktop or web app tends to be more reliable for large-scale cleanup.

Deleting Emails Across Multiple Folders

Outlook doesn't offer a single "delete everything in all folders" button. If you want to clear multiple folders, you need to repeat the process for each one — Inbox, Sent Items, Drafts, Junk, and any custom folders you've created.

What Affects How This Process Works for You 🔍

Not every Outlook user has the same experience with bulk deletion. Several variables shape what you'll see:

• Account type: Personal Outlook.com accounts, Exchange/Microsoft 365 work accounts, and Gmail/IMAP accounts connected to Outlook all behave differently around deletion and recovery
• Outlook version: The classic Outlook desktop app, the newer "New Outlook" experience, the web app, and the mobile app each have different interfaces and feature sets
• Folder size: Very large folders (10,000+ emails) can be slow to process or may time out on slower connections
• Admin/IT policies: Work or school accounts may restrict permanent deletion or enforce retention periods you can't override
• Storage limits: On free Outlook.com accounts, storage limits may affect how aggressively you want to clean up vs. archive

A Note on Archiving vs. Deleting

Before clearing everything out, it's worth asking whether you actually need to delete or just move. Outlook's Archive feature stores old emails in a separate location — either locally on your device or in an online archive folder — without permanently removing them. This frees up your active mailbox while keeping emails accessible if you need them later.

For work accounts especially, archiving is often preferable to permanent deletion, particularly if emails might be relevant for compliance, contracts, or reference purposes.

The scale of what you want to delete, which version of Outlook you're running, and whether your account has restrictions in place will all shape which of these approaches works best in your specific situation.