Anita,
 
I, too, think having IP numbers on the right side of the @ is odd. No
doubt there is a standard for it, though. 8=]'
 
> tried to sign on with an unknown domain. The information to the right of the @
> are all numbers (i.e. 192.245.137.1). The host postmaster doesn't recognize
 
Using NSLOOKUP, I found that this IP address translates to
 
        feenix.metronet.com
 
Which is the primary nameserver of an Irving, Texas (aka Dallas)
Internet Service Provider:
 
        Metronet.com
 
Using WHOIS, I also found that the administrative human at Metronet is
 
        Steven Linebarger <[log in to unmask]>
 
WHOIS also gives a phone number, but I assumed you would not want to
waste the money on a call....
 
Perhaps you already knew all this, but I thought it might help.
 
 Pax,  Dave
Dave Kinnaman <[log in to unmask]> 512/463-9321 #this too shall pass#