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email from a specific address suddenly started disappearing

Luigi Benetton 0 Reputation points
2026-02-25T19:13:26.79+00:00

Hi,

I've been receiving messages from a "donotreply" email address for over 6 months to my outlook.com address with no issues.

On Tuesday, these messages stopped arriving and I can't figure out why.

  • they aren't in Junk mail, or any other folder (I checked the web client to make sure - they are just not arriving)
  • the sender has tested this system twice with me, and they are getting the messages
  • there are no rules or other mechanisms set to affect this address or domain

Has anyone else run into this issue?

Side question: if you have a Microsoft 365 account THAT YOU PAY FOR, does Microsoft offer any support?

Outlook | MacOS | Legacy Outlook for Mac | For home
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  1. Luigi Benetton 0 Reputation points
    2026-02-25T20:15:31.1333333+00:00

    Thanks for your answer

    I just signed in to Defender for my account and it says "Everything looks good." There is no quarantine there. Note: I have a personal (subscription) account.

    There appears to be an issue that can only be resolved on the server side, so I sent my contact the results of my research. Meanwhile, I switched to a Yahoo account to get project management system notifications from them.

    Thanks again,

    Luigi

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  2. Noel Macadangdang 16,440 Reputation points Independent Advisor
    2026-02-25T19:59:54.0833333+00:00

    Hi,

    Thank you for sharing your question. I understand how worrying it is when emails you’ve reliably received for months suddenly stop arriving, especially when you’ve already checked Junk, other folders, and verified that no rules or filters are involved. It makes sense to want clarity when the sender confirms the messages are going out but nothing appears in your Outlook.com inbox.

    Based on Microsoft’s documentation and similar cases, messages that silently don’t arrive are often filtered before they reach your mailbox, such as being quarantined by Microsoft’s security system, even if they never appear in Junk or other folders. In Exchange Online, legitimate emails can be quarantined automatically if the system detects malware‑risk patterns in the message or attachments, and the sender won’t always receive a bounce notification. 

    To resolve this, sign in to the Microsoft 365 Defender portal and check whether the missing messages have been quarantined. If they appear there, you can release them to your inbox. You can access this under Email & Collaboration → Review → Quarantine.  If nothing appears in quarantine, you may also want to ask the sender whether anything changed in their sending system, as Outlook.com sometimes silently drops messages due to backend filtering behaviors noted in similar reports. [learn.microsoft.com] [learn.microsoft.com]

    To help troubleshoot further, could you confirm whether you use Outlook.com through the web, Outlook desktop, or a mobile app, and whether messages from any other automated “donotreply” addresses still arrive normally?

    Feel free to follow up  I’m here to help you track down the cause and restore message delivery.

    I hope this helps.

     

    Best Regards,

    Noel

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