Outlook.com mailbox corrupted by QuickMailChecker / Sky Market

Selim Akdeniz 0 Reputation points
2026-06-23T13:26:19.57+00:00

My outlook.com account has been compromised and my mailbox appears to be corrupted.

Incoming emails are being overwritten with the following content:

"@QuickMailChecket_bot - All-In-One Checker (Hotmail Mix Xbox) - SKY MARKET"

This happens even with brand new emails that i send to myself. The original email content is replaced by the QuickMailChecker/ Sky market page.

I have already:

  • Changed my password
  • Enabled two factor authentication
  • Removed suspicious app permissions
  • Checked and removed al mail rules
  • Checked forwarding settings (disabled)
  • Reviewed account recovery methods

This issue only affects one Outlook account. Other Outlook/Hotmail accounts work normally.

Please investigate my mailbox for corruption, hidden rules, unauthorized mailbox access, and perform a mailbox restore/reindex if necessary.

Thank you

Outlook | Web | Outlook.com | Account management, security, and privacy

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  1. Hornblower409 16,820 Reputation points
    2026-06-24T00:11:13.75+00:00

    @Selim Akdeniz said

    Please investigate my mailbox for corruption, hidden rules, unauthorized mailbox access, and perform a mailbox restore/reindex if necessary.

    Microsoft Support does not monitor this forum. You have to initiate the contact using a standard Support Channel.

    • Logon to https://outlook.live.com/
    • From the main menu: Help -> ? Help
    • {This should open the Help side panel}
    • Search Help -> {Your problem} and press Enter
    • Still need help? [Yes]
    • If you get "We're here to help": Tell us your problem -> {Your problem, again} [Get Help]
    • [Sign In] {Use any Outlook/Microsoft account}
    • Choose a support option -> Chat with a support agent in your web browser You can reference the link to this page in Chat to help the agent understand what you have already done.

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  2. SarahT 0 Reputation points
    2026-10-14T17:09:17.0633333+00:00

    My Outlook.com account has the same QuickMailChecker / SKY MARKET problem. New emails arrive with their original content, but after about a minute the message body changes to “SKY MARKET ALL-IN-ONE CHECKER.” My entire mailbox has also been emptied, and a suspicious forwarding rule keeps reappearing even after I delete it. I have changed my password and used Sign out everywhere. I need Microsoft to investigate the mailbox itself and advise whether my emails can be restored.

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