not receiving all emails to my hotmail account following suspicious activity

Check and remove unauthorized inbox rules or forwarding in Outlook.com first, because compromised-account settings can silently move, delete, or redirect only some incoming messages.

1. Remove unauthorized mail controls

Use a computer and sign in to Outlook.com in a browser:

1. Select Settings (gear) → Mail → Rules.
2. Delete any rule you did not create, particularly rules that:
   • delete messages;
   • move messages to another folder;
   • mark messages as read;
   • redirect messages.
3. Go to Settings → Mail → Forwarding.
4. Turn forwarding off if you did not enable it, and remove any unfamiliar forwarding address.
5. Also review Settings → Mail → Automatic replies and any connected accounts for unauthorized changes.

Microsoft specifically recommends reviewing forwarding and related account settings after an account has been compromised.^1^ Rules must be viewed and edited from a computer.^2^

2. Find messages that were diverted

Check these locations in Outlook.com:

• Junk Email: select legitimate messages, then Report → Not junk.
• Other tab: move legitimate messages to Focused.
• Deleted Items: select missing messages and choose Restore.
• At the top of Deleted Items, select Recover items deleted from this folder. Recoverable items remain available there for up to 30 days.
• Archive and any unfamiliar folders.
• Above the message list, select Filter → All, then Filter → Sort → Date.

These are the documented locations and controls for messages missing from an Outlook.com inbox.^2^

3. Check storage and blocked senders

Open Outlook.com settings and review mailbox/storage usage. If Microsoft cloud storage is full, Outlook.com cannot receive mail; messages sent while it was full are bounced to senders and cannot be recovered.^3^

Also review Settings → Mail → Junk email:

• Remove legitimate addresses or domains from Blocked senders and domains.
• Add important senders to Safe senders and domains if their messages are consistently going to Junk. Safe-listed messages are directed to the inbox.^4^

4. Secure the account completely

If this was not already completed after the suspicious activity:

1. Run a full malware scan on every computer used with the account.
2. Change the Microsoft account password from a clean device.
3. Review the account’s Recent activity. It displays sign-ins from the previous 30 days, including device or application details.^2^
4. Correct the recovery email address and phone number if necessary.
5. Enable two-step verification.

Microsoft’s compromised-account procedure places a full malware scan before changing the password so that new credentials are not exposed again.^1^

5. Test delivery and escalate if necessary

After making the changes:

1. Ask two people using different email providers to send new messages with unique subjects.
2. Check Inbox, Other, Junk, Deleted Items, and Recover items deleted from this folder.
3. Ask whether either sender received a non-delivery report. If only one sender or domain fails and no error appears in Outlook.com, Microsoft recommends having that sender use Outlook.com Sender Support.^3^
4. If multiple unrelated senders still fail after the checks, sign in to Outlook.com, select Help (?), describe the delivery problem, and scroll to Still need help? → Yes to contact Outlook.com support. Support can investigate an account-level delivery restriction that cannot be removed through mailbox settings.^3^

References

1. How to recover a hacked or compromised Microsoft account | Microsoft Support
2. Email is missing from your Outlook.com inbox | Microsoft Support
3. Can't send or receive email in Outlook.com | Microsoft Support
4. Help protect your Outlook.com email account | Microsoft Support