Sending, receiving, and organizing email in Outlook.com
Since some messages arrive and others do not, and the issue appears in both Outlook client and Outlook.com, this points to a mailbox-side filtering or delivery issue rather than an Outlook reinstall issue.
Work through these checks in Outlook.com first:
- Check mailbox storage
- If Microsoft cloud storage is full, Outlook.com cannot send or receive email.
- Messages sent while storage was full are bounced back to the sender and are unrecoverable.
- Check mailbox storage and confirm it is not full.
- Check all message locations
- Check Junk Email, Deleted Items, Archive, Other, and any custom folders.
- In the message list, set Filter > Sort > Date so messages are shown in chronological order.
- Recheck forwarding and rules
- Confirm email forwarding is disabled.
- Recheck that there are no rules preventing messages from appearing.
- Review Junk Email behavior
- Check Junk Email settings and the Junk Email folder.
- If a message is found there, mark it as Not junk or move it back to Inbox.
- Messages in Junk Email are automatically removed after 30 days and are not recoverable.
- Check account security state
- If the password was changed recently, update it everywhere the account is used.
- Review recent sign-in activity for unusual access. If the account was temporarily blocked because of unusual sign-in activity, it may need to be unblocked.
- Ask affected senders whether they receive a non-delivery report
- This is important because some sender-side authentication failures can cause Outlook.com to reject mail before it reaches the mailbox.
- If a sender gets a rejection, the sender must correct their mail authentication or send from a different address temporarily.
- Adding a sender to Safe Senders may not help if the message is blocked before delivery.
- If using connected third-party mail apps
- If a third-party mail service is connected, it must support modern authentication and IMAP.
- If IMAP or POP are active, disable them and test again, because they can cause issues with connected apps.
- If messages are still intermittently missing
- Open Outlook.com while signed in.
- Select Help.
- Enter the query.
- Scroll to Still need help? and select Yes.
- If the Help pane does not open from support page buttons, sign in to Outlook.com first, then select the ? at the top of the Outlook.com window.
Based on the symptoms described, the highest-value checks are: storage, all folders including Other and Archive, forwarding/rules, recent sign-in activity, and sender non-delivery reports. The fact that some messages from the same sender arrive and others do not also makes sender-side rejection details especially important.
- Can't send or receive email in Outlook.com | Microsoft Support
- Email is missing from your Outlook.com inbox | Microsoft Support
- Fixes or workarounds for recent issues on Outlook.com | Microsoft Support
- Why am I not receiving emails from certain senders that I haven't blocked? - Microsoft Q&A
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