I work for a local government agency where we manage our own mailing list for pushing out news and information for our citizens. I try to stay proactive on removing email addresses that no longer exist and dealing with any spam blacklistings. However, there is one non-delivery report that is baffling me. Here is a screen shot:
The blurred out areas indicate our email server.
As you can see, there isn't any email address in there that tells me where the issue resides. I get several of these every time time we send out another news release everything is the same, but the date, thread index, and message id. I have been unable to find any of this in the email server's logs. How do I figure out what email address this relates to so I can remove it?
For context, the emails are generated on our web server using another email server software. Our primary email server is running Exchange. I have talked to our email server admin about this problem, and they don't see anything in their logs.
Update: Here is another type I get with the same problem. I understand what the error means, but how do I know what that domain is?