Yesterday we launched an email around 2 pm PST to a very small segment of lead DB.
Around 8:00 pm PST we received around 200 auto-replies in outlook inbox. I tried to search for the domain or email in my DB but I could not find anything related to the email below in my DB. All the auto-replies has the same domain- ".itscom.net'.
Below are the details of errors-
Original Message Details
Is this Marketo delivery issue or some Microsoft outlook issue. I searched the web but could not find any resolution to that. I am not a domain or email deliverability expert so looking for suggestions to resolve the issue.