I think my client's DNS server is either corrupted or poorly setup.
We have external email senders that are unable to deliver the email to two of my clients.
Is there anyway I can do to do a through check on whether the DNS server is correctly configured?
Windows Server 2008 R2 Standard SP1
Intel Xeon CPU X5650 @ 2.67GHz (2 processors)
80GB HDD, 30GB Free