7,925 questions
I would wager that the external recipient is forwarding to another account that is rejecting it and that is what is bouncing back to the original sender.
Strange Exchange 2013 Standard NDR message
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Caspar
281
Reputation points
One of our clients is running a single Exchange 2013 Standard server. Everything is running fine except a handful of users sometimes get strange bounce messages.
If they create a new email message using Outlook (2013, 2016 or 2019) they can send emails to external contacts without problems. However, sometimes they send out a message and they immediately receive a bounce message that makes no sense and has no good information. The email bounces from an address unknown to us.
Here is an example:
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Undeliverable: "Subject of email"
Systemadministrator <IMCEASYSTEM-administrator@keyman .com>
Send: Sa 26-05-2021 14:19
To:
Delivery has failed to these recipients or groups:
'******@externaldomain.com'
A problem occurred during the delivery of this message. Please try to resend the message later.
Diagnostic information for administrators:
Generating server:
******@externaldomain.com
Remote Server returned ''
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That is all the message contains. No error information or anything. When they create a new email and resend the exact same message with or without attachments it goes out the door without any problems to the same recipient. This happens to just a few users within the company. This only happens sending outbound to external email addresses. Computers are Windows 10 with a mix of different Outlook versions. Is this a known bug? I have found some online but no solution
Exchange | Exchange Server | Management
3 answers
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Eric Yin-MSFT 4,396 Reputation points2021-05-28T01:53:46.567+00:00 Hi,
Search message tracking log on it, if you see it showing "SENDEXTERNAL", that would not be Exchange's problem, you should contact the company's IT guys:Use the Exchange Management Shell to search the message tracking logs
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Caspar 281 Reputation points
2021-05-28T08:41:56.357+00:00 So I checked the message tracking logs on the Exchange Server. None of the emails that get bounced show up in the message tracking log on our own server. There is no entry of them at all, no record. What I did notice is that in all of the bounce messages that we receive (received immediately after sending from Outlook) the external recipients email domains have their MX records pointed to Microsoft Office 365. Maybe this could have something to do with it.. Right now I'm a bit confused about what else to try
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Andy David - MVP 157.8K Reputation points2021-05-28T11:03:43.59+00:00 Open one of the NDR messages and look at the properties.
Any internet headers? -
Caspar 281 Reputation points
2021-05-28T13:16:36.997+00:00 I've changed a few names, but this is all it says. It seems that these emails don't even leave the server and are not recorded in the Message Tracking log
From: Systemadministrator <******@ourdomain.com>
Subject: Undeliverable: Email Subject
Thread-Topic: Email Subject
Thread-Index: AddLtB+kQduNbnyPSZCshPNdRKZPLAGg6Vc/
Date: Wed, 26 May 2021 14:02:31 +0000
Message-ID: <3aae53d4769f4b50964b6174838aded4@sn .domain.local>
Content-Language: nl-NL
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
Content-Type: multipart/report;
boundary="_000_3aae53d4769f4b50964b6174838aded4ServerDomainlocal_";
report-type=delivery-status
MIME-Version: 1.0 -
Andy David - MVP 157.8K Reputation points
2021-05-28T13:22:01.803+00:00 Even if you search by the message ID?
3aae53d4769f4b50964b6174838aded4@sn .domain.local -
Eric Yin-MSFT 4,396 Reputation points
2021-05-31T02:03:27.767+00:00 Hi,
It will be recorded even it didn't leave the server:Get-MessageTrackingLog [-Start <DateTime>] [-End <DateTime>] [-MessageId <MessageId>] [-MessageSubject <Subject>] [-Recipients <RecipientAddress1>] [-Sender <SenderAddress>]
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Caspar 281 Reputation points
2021-06-01T07:53:45.387+00:00 I have tried every message tracking option to find the messages but I cannot find any of them. All the other messages that were send that day are there to the message tracking on the server is working just fine. There is just no trace of these specific messages
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Eric Yin-MSFT 4,396 Reputation points
2021-06-02T06:19:06.41+00:00 According to your description, the issue exists randomly. Can you reproduce the issue with OWA using same accounts? And try tracking the message if it fails again.
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