Your message to @*.edu.au couldn't be delivered. A custom mail flow rule created by an admin at **.onmicrosoft.com has blocked your message. This user account has been discontinued.

Question

Your message to @*.edu.au couldn't be delivered. A custom mail flow rule created by an admin at **.onmicrosoft.com has blocked your message. This user account has been discontinued.

Anonymous 0

Hello!

I hope you are all having a good day. I just wanted to ask a question about how to send an email to someone. This may sound stupid, but they have a discontinued account... is there any way to message them?

It's incredibly important for me to email them so that I can apologise for something. There were no banned words or anything, it was just an error because their account was discontinued. I'm not sure how to message them any other way due to not having their phone number, et cetera.

Please have a wonderful rest of your day / night. Thank you for taking the time to read through my question.

Kind Regards,

Moderator's note: Moved from Outlook | Web | Outlook.com | Email

Locked Question. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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1 answer

Answer 1

Dear @Anonymous,

Could you please confirm whether the ***.onmicrosoft.com domain mentioned in the inquiry belongs to your tenant?

There are two possible scenarios:

If the domain belongs to your tenant: You should contact your IT Admin to review and update the outbound email settings. As the given image below, it appears that "your tenant" is currently blocking emails sent to external recipients. In case you do not know who is your IT Admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support
If the domain is unfamiliar to you and it is possibly related to recipient's tenant: The IT Admin of the tenant hosting the recipient’s account will need to review and configure the relevant mail settings. To help isolate the issue, you can also try sending an email to the same edu.au address from a different email account.

This test will help determine whether the issue is specific to the original sender or related to the recipient’s tenant configuration.

I hope the information shared helps point you in the right direction. Please try the steps above and let me know if they work. If not, we can continue working together to narrow this down.

The first response may not always resolve the issue right away, but with your help and more details, we can work toward a solution.

If the answer is helpful, please click "Yes" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Kien 1,710 Reputation points Independent Advisor

2026-08-13T00:33:28.3933333+00:00

Dear @Anonymous,

I hope you are doing well.

I just wanted to check if my previous response addressed your question correctly. If there is anything I may have misunderstood, I would truly appreciate it if you could provide a bit more detail to help me better understand your needs.

Also, if you are stuck on anything or find something unclear, please feel free to reply so I can guide you further.

There is absolutely no rush - please respond whenever it is convenient for you. I am here and ready to support you whenever you need assistance. Your comfort and timing are important, so take all the time you need.

Thank you for your time, and I look forward to hearing from you whenever you are ready.

Your message to ****@*******.edu.au couldn't be delivered. A custom mail flow rule created by an admin at ****.onmicrosoft.com has blocked your message. This user account has been discontinued.

1 answer

Your message to @*.edu.au couldn't be delivered. A custom mail flow rule created by an admin at **.onmicrosoft.com has blocked your message. This user account has been discontinued.