How to prevent MS365 SMTP server to override the original Message-ID

Question

How to prevent MS365 SMTP server to override the original Message-ID

Bk Santiago 0

When sending an email using SMTP [smtp.office365.com].

When setting up our own Message-ID, it's being replaced by a new one and being moved to X-Microsoft-Original-Message-ID. Any other way we can prevent that?

SokiGuo-MSFT 31,541 Reputation points Microsoft External Staff

2023-11-10T09:52:57.9966667+00:00

Hi

Looks like your issue is more related to Exchange, please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. In order to better solve your problem, we will add Exchange tag.
Jarvis Sun-MSFT 10,231 Reputation points Microsoft External Staff

2023-12-05T08:33:21.2+00:00

Dear @Bk Santiago ,

I wanted to follow up and know if the below responses helped in answering your query. If it did, please do not forget to accept the appropriate response as Answer so that others in the community facing similar issues can easily find the solution.

1 answer

Your answer

SokiGuo-MSFT 31,541 Reputation points Microsoft External Staff

2023-11-10T09:52:57.9966667+00:00

Hi

Looks like your issue is more related to Exchange, please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. In order to better solve your problem, we will add Exchange tag.
Jarvis Sun-MSFT 10,231 Reputation points Microsoft External Staff

2023-12-05T08:33:21.2+00:00

Dear @Bk Santiago ,

I wanted to follow up and know if the below responses helped in answering your query. If it did, please do not forget to accept the appropriate response as Answer so that others in the community facing similar issues can easily find the solution.

Answer 1

Hi @Bk Santiago ,

Welcome to our Q&A forum!

When sending an email using SMTP [smtp.office365.com], if you set up your own Message-ID, it may be replaced by a new one and moved to X-Microsoft-Original-Message-ID. This can cause threading issues in all recipients on the mailing list that you are sending to.

One possible solution is to visit the Microsoft Exchange admin center and check the box “Turn on sending from aliases” under “Mail Flow”. This should allow you to send and receive from an alias address without Exchange resolving it to the primary alias before delivery.

Related thread and details please refer to: https://learn.microsoft.com/en-us/answers/questions/133111/alias-email-address-getting-replaced-by-primary-em

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.

Jarvis Sun-MSFT 10,231 Reputation points Microsoft External Staff

2023-11-20T05:26:32.92+00:00

@@Bk Santiago ,Just checking if there's any progress or updates?

--please don't forget to upvote and Accept as answer if the reply is helpful--

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How to prevent MS365 SMTP server to override the original Message-ID

1 answer

Your answer