Hi KarenOC,
Thanks for your feedback.
Before moving on, I would like to confirm some information with you:
1. Did you check the email with Outlook Web App (OWA)? If not, please check the email with it.
2. Couldn’t you receive emails from both internal and external users?
3. If the sender received Non-Delivery Report (NDR) when the emails failed to be sent. If yes, could you please provide the NDR they received through Private Message?
4. Could you please provide the your domain name the Private Message? We can check if the DNS is in effect.
Your post was responded to in a private message that has a subject of <Information Request: Re:My domain e-mail>.To access the private message:
• Go to the Your details section on the right side of the community site.
• Click Private messages.
• Click the subject title of the response to read the message.
• You can reply by using the form in this display.
• Click Submit Reply.
Thanks,
Eben Liu