How to Find Blocked Emails in Outlook

If an expected message never arrived, Outlook may have sent it to Junk Email, moved it with a rule, or your organization may have held it in quarantine. These locations are different from the blocked-senders list: that list records addresses Outlook should filter, but it is not usually a folder containing the messages. The steps below help you check both the message locations and the settings that may have stopped delivery.

What You’ll Need

Access to the Outlook account where the message was supposed to arrive.
The sender’s email address, or a useful detail such as the subject, approximate date, or a word from the message.
A web browser if you want to check Outlook on the web or a Microsoft 365 quarantine page. For a work or school account, your organization may restrict some settings.

Step-by-Step

Confirm which Outlook account and version you are checking. Make sure you are signed in to the mailbox the sender used. Outlook for Windows, new Outlook, Outlook.com, Outlook on the web, and the mobile app can display different menus. If you have more than one account, switch to the correct inbox before searching. Work and school mail may also be subject to an administrator’s spam filters.
Look in Junk Email first. In the folder list, open Junk Email (it may be called Junk in some app layouts). Search or browse for the sender and expected date. In Outlook on the web or Outlook.com, expand the folder list if Junk Email is not immediately visible. In the mobile app, tap the account or folder menu and select Junk. If you find the message, open it and use Not junk or Mark as not junk, when offered, so Outlook can treat it as wanted mail. Check the destination folder afterward; the message may move to Inbox.
Search the whole mailbox, not only the Inbox. Use Outlook’s search box and enter the sender’s full address, a distinctive subject phrase, or both. If the search offers a scope, select all folders or the entire mailbox rather than Current folder. Search results can reveal a message in Archive, Deleted Items, another folder, or a conversation that was grouped under a different subject. Remove narrow date filters if you are unsure when it arrived. For a reliable check, search once by address and again by a word in the subject.
Check the blocked-senders list in Outlook on the web or new Outlook. Select the gear icon, then choose Mail and Junk email. Look under Blocked senders and domains for the sender’s address or domain. Menu wording can vary slightly by account or update. If the address is listed and you want its mail, select it and remove it from the blocked list, then save changes if Outlook prompts you. Removing an entry affects future filtering; it does not necessarily bring back messages already placed in Junk or deleted.
Check the blocked list in classic Outlook for Windows. Open the Home tab, select Junk, then Junk E-mail Options. Open the Blocked Senders tab and look for the sender or domain. To allow that sender again, select the entry and choose Remove, then confirm with OK. If you use Outlook with multiple accounts, verify that the options belong to the mailbox you are investigating. This route applies to classic Outlook for Windows; new Outlook has a different settings interface.
Inspect other folders and rules. Check Deleted Items, Archive, and any folders with names such as Newsletters or Receipts. Then open Outlook settings and review Rules (in many web versions, under Mail). Look for rules that move, delete, forward, or mark messages from the sender. In classic Outlook, rules are available from the Home tab through Rules or Manage Rules & Alerts. A rule can redirect mail even when the sender is not blocked. Change or disable only the rule that explains the missing message.
For a work or school mailbox, check quarantine. Some organizations use Microsoft Defender or another email security service to hold messages before they reach Outlook. Search your organization’s quarantine page or look for a quarantine notification email. If you cannot access the page, ask your IT administrator to check for the sender, subject, and approximate delivery time. A message held in admin quarantine may not appear in Junk Email, and only an administrator may be allowed to release it. Follow your organization’s security process rather than opening a suspicious attachment just to test delivery.

Common Mistakes

Assuming the blocked list is a mailbox folder. Outlook’s blocked-senders settings are generally a list of addresses or domains to filter, not a searchable archive of everything they sent. To find a particular message, search Junk Email and the rest of the mailbox, and check quarantine for managed accounts.

Checking only the Inbox. A message may have arrived successfully but been moved by a rule, swept into Archive, or placed in Deleted Items. Search all folders and review rules before concluding that Outlook rejected it.

Removing a sender and expecting old mail to return. Unblocking typically changes how later messages are handled. It does not automatically restore a message already deleted, and it may not move an existing Junk Email message. Find the original and move it yourself if you still want it.

Allowing an entire domain unnecessarily. Adding a domain such as example.com as a safe sender can allow mail from many addresses, not just one person. Prefer the exact sender address when that is sufficient, and only trust a sender you recognize.

Tips

Search by the sender’s complete email address rather than their display name. Display names can be shared, changed, or spoofed.
If you find the message in Junk, mark that specific message as not junk. If Outlook repeatedly filters future mail from the same legitimate sender, add the exact address to Safe senders and domains in Junk email settings, if that option is available.
Check both the sender and domain entries in the blocked list. A blocked domain can affect multiple senders at that domain, while a single blocked address is narrower.
Keep a note of the subject and approximate send time when asking IT for help. Those details make it easier to locate a quarantined message in a work or school system.
For an important expected message, ask the sender to resend it after you have corrected the setting. This is often faster than trying to recover a message that was permanently deleted or expired from quarantine.

Troubleshooting

Junk Email is empty, but the message is still missing: Search all folders using the sender address and a subject keyword. Check Deleted Items, Archive, rules, and any focused or secondary inbox views. If this is a work account, ask your administrator to search quarantine and mail-flow records; a company filter can stop delivery before Outlook receives the message.

You cannot find Junk email settings: Confirm you are using the correct account and interface. In web Outlook and new Outlook, start with the gear icon and look under Mail settings for Junk email. Classic Outlook for Windows uses Home > Junk > Junk E-mail Options. The mobile app is useful for checking folders, but some account settings may be easier to manage in a desktop browser.

The sender is not listed as blocked: A rule, a domain-level block, a server-side spam filter, or an administrator policy may be responsible. Check rules and safe/blocked entries, including any domain entry. If the mail is missing from every folder, ask the sender to confirm the address they used and whether they received a delivery failure notice.

You removed the block, but new messages still go to Junk: Review Safe senders and domains and add the exact address only if you trust it. Also check whether a rule continues to move the mail. Security filtering may still classify a message as spam based on its content or authentication, and an organization may override personal settings. If the behavior continues on a work account, contact IT.

You found a message but cannot restore it: In Junk Email, select the message and choose Not junk or move it to Inbox. In Deleted Items, use Move to return it to a folder. If it is absent from Deleted Items, check whether your account has a recoverable-items option or contact your administrator promptly; recovery availability and retention periods depend on the account.

Frequently Asked Questions

Does Outlook keep a folder of emails from blocked senders?
Usually, no. The blocked-senders list stores filtering preferences. Messages may be routed to Junk Email or rejected, depending on the account and filtering setup, so check folders and quarantine separately.

Will unblocking an email address restore messages already blocked?
Not by itself. Unblocking changes the setting for future mail. Find any existing message in Junk, Deleted Items, or quarantine and move or release it separately.

Can I find blocked emails in Outlook on my phone?
You can open Junk and search mailbox folders in the Outlook mobile app. If you need to edit the blocked-senders list or review detailed rules, use Outlook on the web or desktop settings if those options are not shown in the app.

Why does a sender keep going to Junk after I mark a message as safe?
A rule, domain block, message-level spam signals, or an organization policy may still apply. Check each of those, and ask IT to investigate if it is a managed mailbox.

Can I tell whether Outlook blocked a message before it arrived?
Personal Outlook folders cannot show every message rejected upstream. For a work or school account, an administrator may be able to search quarantine or mail-flow records. You can also ask the sender whether they received a delivery failure notice.

Sources: general know-how. Menus and buttons can differ slightly by version. Spotted something out of date? Tell us.