I transfered the zone info using NSLOOKUP to one of its
authoritative name servers.  I suspect that the user or
sysadmin misconfigured their SENDMAIL, or the hostmaster of the
DNS misconfigured the "A" record.  The host that I found had
a similar "sounding" name:
 
ohmy.internet.com
****
 
I suggest that you e-mail the user, as well as POSTMASTER to
inquire if that is the correct spelling.
 
BTW, I tried to VRFY the userid johnmcg and it did not, so
I may be "all wet" with my analysis!
 
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