Apple Mail search not working? How to fix it on a Mac

When Apple Mail search can't find an email you know is there, the cause is usually one of three things. Mail searched only the selected mailbox. A search filter in the field narrowed the results. Or the Spotlight index that Mail relies on is incomplete. Try the fixes below in order. The first three take seconds, and none of the steps before the last one deletes anything.

These steps match macOS 27 as of November 2026. Each one links to the Apple page it comes from.

Search all mailboxes, not just the one you're in

Mail searches the mailbox selected in the sidebar. Apple's guide, Search for emails in Mail on Mac, says: "If there are no results in the current mailbox, click 'Search all mailboxes' below the search field." If you search from the Inbox, a message you archived or filed somewhere else will not show up until you do this.

You can also choose where to search before you type. Select one or more mailboxes in the Mail sidebar or the Favorites bar, then search.

Remove search filters you don't need

When you pick a suggestion as you type, Mail turns it into a search filter in the search field, such as a sender or "Subject contains". Each filter you add narrows the results, and Mail shows only messages that match all of them. Apple's advice: "If you don't get expected results, remove some of the search filters."

Check two things in the search field:

1. A filter left over from your last search. Delete it and search again.
2. A filter set to the wrong field. If a filter has a down arrow, click it. You can change it to search Entire Message instead of only the subject or the sender.

Also check the filter above the message list. If View > Filter is on (the default filter shows only unread mail), messages that don't match it stay hidden.

Include Trash, Junk and encrypted messages

Mail can leave the Trash and Junk mailboxes, and encrypted messages, out of a search of all mailboxes. To include them, choose Mail > Settings, click General, and select the options under When searching all mailboxes, include results from. Apple describes the setting on its General settings page.

If the email you are looking for went to Junk, this is likely why search can't find it.

Wait for Spotlight to finish indexing

Mail's search depends on Spotlight, the search index macOS keeps of your Mac. Apple's page About Spotlight indexing and search results lists "A notification from Mail that indexing is incomplete" as a sign that indexing is still running. Indexing runs after a macOS update, after you add an account, and as new mail arrives.

Apple says indexing "can take hours or even days" on a Mac with a lot of data, and it goes faster when:

• your Mac is not in use
• it is connected to power
• it is on Wi-Fi or Ethernet, "in case email or other data needs to be downloaded for indexing"

So after a macOS update, leave your Mac plugged in and online overnight before you try anything else. Messages that have not downloaded to your Mac yet can't be indexed.

Check that Spotlight is allowed to index your mail

Spotlight skips any disk or folder in its privacy list. If your startup disk, your Library folder or the Mail folder inside it is on that list, Mail search misses mail.

1. Choose Apple menu > System Settings, then click Spotlight (on older macOS, Siri & Spotlight).
2. Check that mail is turned on in the list of what Spotlight searches.
3. Scroll down and click Search Privacy (on older macOS, Spotlight Privacy).
4. If Macintosh HD, your Library folder or a Mail folder is in the list, select it and click the remove button (–).

Rebuild the Spotlight index

If search is still wrong, have Spotlight index your disk again. Apple gives these steps on its Spotlight indexing page:

1. Choose Apple menu > System Settings, then click Spotlight.
2. Scroll down and click Search Privacy.
3. Click the add button (+) and choose Macintosh HD, or drag the disk into the list.
4. Wait a few seconds. Select the disk you just added and click the remove button (–).
5. Click Done and quit System Settings.

Spotlight then indexes the whole disk again. This deletes nothing, but it takes hours on a big disk, and Mail search stays incomplete until it finishes.

Rebuild the mailbox

Rebuilding makes Mail download a mailbox again from the server. Apple's Rebuild mailboxes in Mail on Mac page recommends it "if you can't find all relevant messages when you search using the Entire Message search option." That page is in Apple's guide for macOS Sequoia. The macOS 27 guide does not have it.

1. In the Mail sidebar, select the mailbox that search misses, such as the Inbox or Archive.
2. Choose Mailbox > Rebuild.

Apple warns that for IMAP and Exchange accounts, which includes iCloud, Gmail and Outlook, "messages and attachments stored on your Mac are discarded, and then downloaded again." The mailbox looks empty until the download finishes. Apple's page does not say what Rebuild does to a mailbox under On My Mac, whose messages exist only on your Mac, so back up with Time Machine before you rebuild one.

Last resort: reset Mail's message database

Apple does not document this fix. Mail keeps its own database of your messages in a file called Envelope Index. If that file is damaged, Mail search misses messages even when Spotlight is fine. Many Mac users report that moving the file out makes Mail rebuild it from the mail on your Mac.

Back up your Mac with Time Machine first. Then:

1. Quit Mail.
2. In Finder, choose Go > Go to Folder, type ~/Library/Mail/V10/MailData, and press Return. On macOS 27 the folder is V10. If V10 isn't there, open ~/Library/Mail and look for the folder that starts with V and has the highest number.
3. Move every file whose name starts with Envelope Index to your Desktop. Move them. Do not delete them.
4. Open Mail. It imports your messages again, which can take an hour or more for a large mailbox.

If search works afterward, delete the old files from your Desktop. If Mail has problems, quit it, put the files back and open Mail again.

Search that finds what you remember

Alrighty is a mail app for Mac, Windows and Linux with its own search. Type what you remember, in your own words, and it finds the email: "when is my flight" brings up the airline's confirmation even though it never says "flight". Search runs on your Mac. You can also ask a question and get the answer, with the emails it came from. See how it works on the features page, or download Alrighty. To compare it with other apps, see the best email search apps for Mac.

If you'd rather keep Apple Mail, our list of Apple Mail plugins shows what works on macOS 27.

Questions

Why can't Apple Mail find an email I can see?

The most common reason is that Mail searched only the mailbox selected in the sidebar. Click Search all mailboxes below the search field. If that doesn't help, remove the search filters in the field, then check that Spotlight has finished indexing.

Does Apple Mail search use Spotlight?

Yes. Mail search depends on the Spotlight index on your Mac. Apple's Spotlight page lists a Mail notification that "indexing is incomplete" as a sign that indexing is still running. If Spotlight can't index your Mail folder, Mail search misses messages.

How long does it take to rebuild the Spotlight index?

Apple says indexing "can take hours or even days," depending on how much data is on your Mac. It goes faster when your Mac is idle, plugged in and online.

Does rebuilding a mailbox delete my email?

Not for iCloud, Gmail, Outlook or other IMAP and Exchange accounts. Mail discards its local copy and downloads the messages again from the server. Mail stored only under On My Mac has no copy on a server, and Apple doesn't say what Rebuild does to it, so back it up first.