Issue Receiving MDN Test Messages – SMTP MT Test 39 (Disposition-Notification Header)

[Pranav Kulkarni]

Hi,

Description:

We are currently performing Direct Messaging certification testing using the ETT tool and are encountering an issue with receiving messages for the MDN header validation test.

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Test Case Details:

• Test: SMTP MT Test 39 (Message with Good Header)

• Direct Address: fh...@fhir.spryhealth.care

• Vendor Hostname: mail.fhir.spryhealth.care

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Issue Observed:

• When executing SMTP MT Test 39, the ETT tool shows:

  • “Email sent Successfully”

  • A valid Message-ID is generated

• However:

  • The message is not received on our SMTP server (Apache James)

  • No corresponding SMTP logs (MAIL FROM / RCPT TO / connection) are observed during the test

  • The message does not appear in the inbox for processing

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Working Scenario (For Comparison):

• When using “Send Direct Message” from the ETT tool:

  • Messages are successfully received

  • Processed correctly

  • MDNs are generated and sent back successfully

• This is also reflected in the Message Status section where:

  • Status shows MDN_RECEIVED

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Environment Details:

• SMTP Server: Apache James

• SMTP Port: 25 (publicly accessible)

• MX रिकॉर्ड:

  • fhir.spryhealth.care → mail.fhir.spryhealth.care

• DNS CERT record is correctly configured and validated

• External connectivity to SMTP is confirmed (accessible from external networks)

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Observations:

• No inbound SMTP connection is logged during SMTP MT Test 39 execution

• Indicates that the message may not be reaching our server at all

• Other Direct messages from ETT are successfully delivered, suggesting partial connectivity

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Request for Assistance:

Could you please help us verify:

1. Whether the message for SMTP MT Test 39 is being dispatched from ETT successfully?

2. If there are any delivery failures or routing issues on the ETT side?

3. Whether this test uses a different delivery mechanism or endpoint compared to “Send Direct Message”?

4. If there are any specific requirements (e.g., TLS, trust anchors, policy constraints) that could prevent delivery of this specific test message?

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Additional Information:

• We can provide timestamps and Message-IDs for correlation if needed

• Logs from our SMTP server show no incoming connection attempts for this test

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Attachments:

• Screenshot showing successful send (SMTP MT Test 39)

• Screenshot showing successful MDN processing for normal Direct messages

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Conclusion:

Our system is able to receive and process standard Direct messages successfully, but messages sent as part of the MDN header validation test (SMTP MT Test 39) are not reaching our server.

We would appreciate your guidance in identifying the root cause.

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Thanks & Regards,
Pranav Kulkarni

[Sai Valluripalli]

Your direct cert is missing SKI/AKI. Please correct it and try again.

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[Pranav Kulkarni]

The same issue is occurring again. We are able to receive Direct messages, but delivery notifications are not being received.

[Vishnu Mulla]

To ensure we can review this accurately, could you please confirm or provide the following (if not already included):

        •        The Direct test scenario you are running (Sender / Receiver) and test case number

        •        The issue you are encountering and the expected behavior

        •        Screenshots of the issue or error messages observed

- Vishnu

[Pranav Kulkarni]

Hi,

I have already provided the requested details above, but summarizing again for clarity:

• Test Scenario: Receiver – SMTP MT Test 39 (Message with Good Header)
• Issue: ETT shows “Email sent successfully” with Message-ID, but no SMTP connection/logs are observed on our Apache James server and the message is not received
• Expected Behavior: Message should reach our SMTP server, be processed, and generate an MDN
• Screenshots of both scenarios (failing test and working Direct message flow) were already shared above.

Please let me know if any additional information is required.

Thanks & Regards,
Pranav Kulkarni

[Jayaraj P]

Pranav, we had the same issue, it got resolved when our trust anchor has been upload into ETT tool, make sure that you share the your anchor with ETT tool. 

Thanks & Regards,

Jayaraj P

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[Pranav Kulkarni]

Hi Jayaraj,

I have already uploaded our trust anchor into the Edge Testing Tool (ETT), but the issue still persists.
B1 (Receive using SMTP) and H1 (Send Direct Message) are working correctly, and messages are being received by our server. However, H1 delivery notification tests (SMTP MT Test 39, 40, and 41) are not able to receive.

[Sai Valluripalli]

This issue is resolved with Pravav after uploading the correct Direct certificate.

Thanks

To view this discussion visit https://groups.google.com/d/msgid/edge-test-tool/31a7d1aa-4878-4f74-8e05-726bb4b4615dn%40googlegroups.com.