Unable to send emails as all returned as undeliverable

Nicola Rutherford 0 Reputation points
2026-09-02T14:37:44.8333333+00:00

I am unable to send emails from my hotmail account. They are all being returned as undeliverable as they are identified as spam. Someone tried to hack my account yesterday and the emails have been blocked due to multiple password attempts. I have changed my password and need to know how I can unblock my account and rectify the issue of sending emails.

Many thanks

Outlook | Windows | Classic Outlook for Windows | For home
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  1. Chloe-V 12,605 Reputation points Microsoft External Staff Moderator
    2026-09-03T02:11:05.4233333+00:00

    Hi @Nicola Rutherford

    I’m sorry to hear that your Hotmail account may have been compromised and that your outgoing messages are being rejected as spam.

    Please try the following:

    • Run a full antivirus or malware scan on the device you use to access the account.
    • Sign in to your Microsoft account and review Recent activity. Mark any unfamiliar activity as not yours.
    • Check your account settings and remove any unfamiliar aliases, recovery details, connected accounts, forwarding addresses, inbox rules, or automatic replies.
    • Since you have already changed your password, enable two-step verification to help secure the account.
    • Use the Microsoft Sign-in Helper to complete any required security verification and unblock the account:
    • After completing the security checks, send one simple test email from Outlook.com in a web browser without links or attachments.

    If the message is still returned, please reply with the complete undeliverable notice, including the error code, while removing your email address and any other personal information. This will help identify whether the rejection is caused by an account restriction or another delivery issue.

    Please feel free to let me know if you have any further updates, thanks.


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