I had this question after viewing DNS MX record query problem
have a problem resolving mx record for madronafoods.com on my dc.
while when try mx record
DNS request timed out. for madronafoods.com
timeout was 2 seconds.
I can't change my primary DNS as it has to be my DC
when I try nslookup on another ISP I am getting correct mx record
madronafoods.com mail exchanger = 0 madronafoods-com.mail.prot
this problem Is only with a single domain. and my email server can't send and email without resolving mx.
what can cause such problem