Nope, I control the only DNS entries. I even double checked from home. As an experiment I made an additional MX record:
sample.com. IN MX 10 spam.sample.com
sample.com. IN MX 20 isa.sample.com
but still the error... I am beginning to think the problem is a dns issue. Bind is still very new to me.
@ IN SOA dns.sample.com. twink_dakid.sample.com. (
IN NS dns.sample.com.
162 IN PTR dns.sample.com.
163 IN PTR spam.sample.com.
164 IN PTR isa.sample.com.
I tried to copy everything down to the last dot. If anyone sees anything please let me know.
Falko, thank you for the help so far...