Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.I am sorry to hear that you are having such trouble. I will try my best to help you out and resolve the problem as quick as possible.
What email service are you using?
Is it configured on MS outlook?
i am sorry i will open the question to exchange server expert as i have no expertise in exchange mail server.
Hi there, my name is***** we do remote sessions using our own sharing client. I think it costs $5 extra or something like that. But before we do that, can you provide me with a little more information about the problem? What's happening to external mail and why do you think it's a DNS issue?
Can you also run the Inbound SMTP Email test on the Microsoft Remote Connectivity Analyzer to see what it tells you.
And can you run a dig on your Exchange server domain and have that output handy?