Share via

Emails sent to Microsoft domains being sent to junk and or quarantined

Ben 0 Reputation points
2024-10-02T18:06:52.13+00:00

Since Monday our emails sent from our domain are either being quarantined or sent to junk when any recipient is in a Microsoft domain. The same is true for emails sent to Outlook.com, hotmial.com etc. We are not having issues sending to Gmail or G-Suite or other domains. We have had the proper DKIM, SPF and DMARC records in place for years now. We don't send spam or bulk emails and we are not appearing on any blacklists. Anyone have an insight as to what could be going on since Monday that would be causing this. It is causing major communication issues with clients.

Microsoft 365
Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
4,864 questions
Outlook
Outlook
A family of Microsoft email and calendar products.
3,801 questions
0 comments

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Rafael da Rocha 5,166 Reputation points
    2024-10-03T01:21:14.2533333+00:00

    If any of your clients have an IT team, in a few clicks they should be able to check the logs and see why the message was flagged.

    You being on the sender end leaves little options for troubleshooting without some recipient colaboration.

    0 comments
  2. ChristyZhang-MSFT 23,146 Reputation points Microsoft Vendor
    2024-10-03T02:37:49.3233333+00:00

    Hi @Ben ,

    Welcome to our forum!

    What's your accout?

    Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. In terms of Outlook desktop client, we can contact the recipients to do the below action:

    • Report the email as not junk using Microsoft Message Add-in or the Outlook buttons. User's image
    • Right click the email sent from you > Never block Sender's Domain. User's image

    You can also refer to this official article to do more actions: How to handle Legitimate emails getting blocked (False Positive), using Microsoft Defender for Office 365.

    Hope to help you!

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    0 comments

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.