not reciveing all of my email from one email address

Work through these checks step by step to isolate why messages from that one sender are not arriving.

1. Confirm the messages are not being filtered in Outlook.com

• Sign in to Outlook.com in a browser.
• Check Junk Email, Deleted Items, and any custom folders.
• In Junk Email, if any message from that sender appears, right‑click it and choose Mark as not junk so future messages go to Inbox.
• In the Inbox, select Filter > Sort > Date to ensure messages are not just appearing out of order.

2. Check Junk/blocked settings and rules

• In Outlook.com, go to Settings > Mail (or Options) > Junk Email.
• Review:
  • Blocked senders and domains: If the store’s address or its domain is listed, remove it.
  • Safe senders and domains: Add the store’s address/domain here to help ensure delivery.
• Check Rules in Outlook.com and in the Outlook app to make sure there is no rule moving or deleting messages from that address. If there is, disable or delete it.

3. Check Focused/Other and filters

• In Outlook.com and the Outlook app, check both Focused and Other tabs.
• Make sure no filters are hiding messages (e.g., “Unread,” “Mentions,” or a category filter). Clear filters so All messages are shown.

4. Verify mailbox and account status

• If using Outlook.com (Microsoft consumer account), confirm that Microsoft cloud storage is not full. If storage is full, new messages are bounced and are unrecoverable. Free up space via the mailbox storage page linked from the error banner if present.
• If there are sign‑in or account‑block issues, use the Microsoft account sign-in helper or follow the steps to unblock your Outlook.com account.

5. Check forwarding and POP/IMAP

• In Outlook.com settings, verify Forwarding:
  • If forwarding is enabled, ensure Keep a copy of forwarded messages is turned on so messages still appear in Outlook.
• If using POP/IMAP with another app or service, confirm it is not configured to delete messages from the server after download.

6. Ask the sender to check their side Share this with the website/support team:

• Ask them to confirm that their system is actually sending to the exact Outlook address (no typos, no extra spaces).
• Ask if they see any bounce or error messages when sending to the address. If they do, they should follow Sender Support in Outlook.com.
• Ask them to add the Outlook address to their own safe/allow list and retry.

7. If still not receiving from that one sender

• Try sending a test email from another provider (for example, a personal Gmail account) to the Outlook address. If that arrives, the issue is likely specific to the website’s sending system, and they must work with their mail provider using the Sender Support guidance above.
• If other senders also start failing, run through the full Outlook.com “Can’t receive mail” checklist and, if needed, use the interactive troubleshooter linked there.

If none of these steps resolve it and only that one sender fails, the final resolution typically requires the sender’s mail administrator to work with Microsoft via the Sender Support channel.

References:

• Can't send or receive email in Outlook.com
• Where are my email messages or calendar events in Mail and Calendar for Windows 10?
• Issues sending and receiving email
• I can't send or receive messages in Outlook
• Not receiving emails in a timely manner. - Microsoft Q&A
• I haven't received any email in Outlook for several months - Microsoft Q&A
• Stopped receiving emails on my account. - Microsoft Q&A
• MSN email issues - Microsoft Q&A
• Why am I not able to receive emails which I used to on my outlook mac. I can send emails without any issues. - Microsoft Q&A