Email Communication fails to some adresses

Question

I'm using Azure Email Communication Service to send an email for user confirmations using azure email communication service but it fails for some addresses. In my log analytics I just get the DeliveryStatus "Failed". How can I get more information why it failed?

The weird thing is that it works for my old student email xxx@student .umu.se but fails for my employee email xxx@うぬ .se for example. The university runs their services on Azure also. According to the university they never sees the failed emails on their side. It works for gmail, hotmail, proton and a couple of other organisations on Azure that I have tried. It also fails for iCloud addresses.

I have no ide whats going wrong, how can I get more information on why the email fails to be delivered to the affected addresses. I know that its valid email addresses that fails.

Answer 1

To benefit the community Sharing our comments as Answer.

After changing to sending domain from xxx.se instead of sub domain mail.xxx.se issue got resolved and able to send the email s from the Azure communication service.

Thanks @Göran Mannberg for sharing the solution that worked with the community and your cooperation with this.

Answer 2

So I have been running Azure Communications Services Email since January and have had no issues until 11:36 this morning when I started to received "Delivery: Failed" errors.

The available deliver messages should be "Out for delivery", "Queued", "Dropped". There is no documentation on "Failed".

Interestingly this is only affecting 3 of the target email addresses including mine. Other colleagues are still receiving emails.

I have tested sending emails to gmail accounts and other users in the organisation and that is all fine...

Thoughts?