Microsoft Email Suspation

IT Support 266 Reputation points
2024-06-28T02:36:46.74+00:00

Dear Microsoft,

I would like to know about email system. Now we received many suspation mail from one member but She didn't know everything about this. This is very important for us because mail arrived to all organization member and some read it. We urgently need to solve / troubleshoot this case. thank you.

User's image

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.
4,191 questions
Microsoft Teams
Microsoft Teams
A Microsoft customizable chat-based workspace.
9,449 questions
Outlook
Outlook
A family of Microsoft email and calendar products.
3,297 questions
SharePoint
SharePoint
A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
10,107 questions
Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
5,027 questions
0 comments

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Joan Hua-MSFT 305 Reputation points Microsoft Vendor
    2024-06-28T07:34:46.95+00:00

    Hi @ IT Support

    Welcome to our forum!

    Does the error occur recently? If so, is there any specific operation did you do before the error occurred?

    And what is your account? An Exchange online account or something else?

    As i known, The destination email server that generated the 5.1.0 error won't accept messages from you (the sender) or messages for the recipient. This can happen if messages from you (your email address, your Exchange Online organization, or even all of Exchange Online) are being blocked by the recipient.

    If you are using an Exchange account, you may try the following steps, more information: Fix NDR error 550 5.1.0 in Exchange Online - Exchange | Microsoft Learn

    User's image In addition, to protect your domain details, we have removed some personal information from your post. In order to avoid privacy leakage, please remember to hide your personal information when you post next time.

    Hope it helps!

    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