Stupid error, driving me crazy!

[timothy at erinet.com]

> I know this is something really stupid. But I can't get a subdomain to work
> properly, and I don't know why. Would someone try looking up aip.acp.org? It
> fails from outside, as near as I can tell. Then try using the server
> exeter.acp.org and trying it - it works fine. What am I doing wrong?

Well.. It doesn't seem to fail for me.  Are you looking for something
else?

$ nslookup
> set type=any
> aip.acp.org
Server:  <squelched>
Address:  <squelched>

Non-authoritative answer:
aip.acp.org
        origin = exeter.acp.org
        mail addr = postmaster.acp.org
        serial = 1999111601
        refresh = 3600 (1H)
        retry   = 300 (5M)
        expire  = 3600000 (3600000)
        minimum ttl = 1800 (30M)
aip.acp.org     nameserver = exeter.acp.org
aip.acp.org     nameserver = defiant.acp.org
aip.acp.org     preference = 10, mail exchanger = acpgate.acp.org
aip.acp.org     preference = 50, mail exchanger = exeter.acp.org
aip.acp.org     preference = 50, mail exchanger = defiant.acp.org
aip.acp.org     internet address = 149.28.226.101

Authoritative answers can be found from:
aip.acp.org     nameserver = exeter.acp.org
aip.acp.org     nameserver = defiant.acp.org
exeter.acp.org  internet address = 149.28.112.2
defiant.acp.org internet address = 149.28.112.6
acpgate.acp.org internet address = 149.28.226.101