Hi we import contacts from Azure AD to Dynamics 365 marketing solution on a weekly basis.
Then we send by weekly newsletter to all employees.
in each mail-out, There were some hard bounced emails. I verified those are active once. if I use Outlook to email to those emails, there are successfully delivered to the right people.
Here is the error when I downloaded the hard bounced emails. It is indicated as an inactive mailbox. If that is the case, how Outlook is able to deliver the mail?
I checked with the IT group that takes care M365 email server. They mentioned that some emails never came through to the exchange. not a trace at all of those emails.
Could you advise me on how I can debug and resolve this issue?
thank you,
Siva