receiving emails

Question

receiving emails

משרד זלקו בע"מ 0

hello,
I am receiving messages from people that their email was not delivered.

as you can see here.

User's image

please help me fix this problem

0 comments

3 answers

Your answer

Answer 1

Hello @משרד זלקו בע"מ,

Based on the screenshot, the issue appears to be related to email forwarding, rather than receiving email directly.

The NDR indicates this typically means that mail sent to the account was received, but Microsoft 365 was unable to forward it to the configured forwarding destination.

To better understand the issue, could you please provide a bit more information?

Is the issue affecting only one mailbox or multiple mailboxes?
When did the problem first start?
Did the forwarding action fail for internal recipients, external recipients, or both?
As this question was posted under the Classic Outlook category, may I ask whether the issue occurs only in Classic Outlook, or does it also occur in other Outlook clients such as Outlook on the web (OWA) or New Outlook?
Have any mail flow, forwarding, or security policy changes been made recently?
Do other users in your organization experience the same issue, or is it limited to this mailbox?

Additionally, could you please provide the full Non-Delivery Report (NDR), especially the "Diagnostic information for administrators" section at the bottom of the message? The exact error code (for example, 550 5.7.x, 550 5.4.x, etc.) will help determine the root cause and provide the appropriate resolution.

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(Please ensure that any personal or sensitive information is removed before uploading images or information to this public forum.)

Also, if you're an end user, please contact your organization's IT administrator first to check whether any mail flow, security, or anti-spam policies are restricting automatic email forwarding.

Looking forward to your response so we can get this sorted out for you together.

Answer 2

משרד זלקו בע"מ 0

I did not receive the email.

I only got a screenshot as posted earlier

Daniel-Vo 6,695 Reputation points Microsoft External Staff Moderator

2026-10-08T12:24:07.8166667+00:00
Thank you for your response, @משרד זלקו בע"מ.

In this case, could you please ask the person who provided the screenshot to click "Diagnostic information for administrators"? This should reveal the full error code and detailed error message. That information is very important for troubleshooting and will help identify the root cause of the issue.

Additionally, may I ask whether you are the end user or the IT administrator for your organization?

If you are an end user, have you had a chance to contact your IT administrator regarding this issue?

If you are the IT administrator, please let me know so I can provide more targeted troubleshooting steps.

It would also be very helpful if you could provide the information requested in my previous reply. The more details I have about the environment and symptoms, the better the chance of identifying the cause and resolving the issue quickly.

Thank you again for your understanding and cooperation. I look forward to your response.
משרד זלקו בע"מ 0 Reputation points

2026-10-08T14:02:21.6333333+00:00

no.
but I am hearing that even emails that do reach my account get an error of delivery.

how can I fix that?
Roebe Ta 1,545 Reputation points Independent Advisor

2026-10-09T13:52:51.4933333+00:00

Hello @משרד זלקו בע"מ.

Could you please clarify what "no" is referring to?

In the previous response, there are several questions. Since your reply only says "no", I'm not sure which question you are answering.

Additionally, the screenshot by itself does not provide enough information to troubleshoot the issue. It shows that a delivery failure occurred, but it does not contain the full error code or diagnostic details needed to determine the root cause.

Could you kindly provide the information requested so we can help you troubleshoot further?

If your organization has an IT administrator, please contact them and ask them to verify that your account has a valid Microsoft 365 license assigned and that Exchange Online is enabled for your mailbox. Issues with licensing or mailbox provisioning can affect mail delivery and should be checked by an administrator first.

Thank you. I look forward to your reply.

Answer 3

The screenshot indicates a forwarding failure, not a general mailbox storage problem.

Use this check path:

Open the non-delivery report and scroll to Diagnostic information for administrators.
- That section usually shows the exact reason the message could not be delivered.
- Common causes include an invalid destination address, a forwarding rule pointing to a bad address, or a delivery rejection.
Check whether the mailbox has forwarding or rules configured.
- A similar symptom can happen when mail is being forwarded to another address that is no longer valid or is misconfigured.
- In Outlook on the web, check Rules and Forwarding settings and remove any forwarding entry or rule that sends mail to an incorrect external address.
Verify whether the message actually reached Microsoft 365.
- In the Exchange admin center, go to Mail flow > Message trace.
- Run a trace for one of the failed messages.
- Check the result:
  - Failed = the message was rejected; open the details for the exact error.
  - Quarantined = the message was stopped by filtering.
  - Delivered = the message reached the mailbox and may have been moved by a rule or hidden in the client.
Check Outlook on the web.
- If mail appears in Outlook on the web but not in the desktop app, the issue is likely the Outlook client or sync/view settings rather than mail delivery.
If the sender received a bounce message, review that error code.
- NDR or SMTP codes such as 550 5.1.1 or 550 5.7.1 usually identify why delivery failed.

If the failure is specifically because a message is being forwarded from the mailbox to another address, the fix is usually to remove or correct the forwarding rule or forwarding destination.