[IMail Forum] DNS Question: Reverse stuck in a loop?

[Chris Ulrich]

We're having trouble with one of the client IMail servers behind the firewall.
It isn't getting reverse DNS lookups properly.  When we run at DNSStuff, it is in a loop.

http://www.dnsstuff.com/tools/ptr.ch?ip=mail.dcstransusa.com

Here's the content of their zone...

; dcstransusa.com 
$TTL 86400
@ SOA ns1.cydian.com. domain-admin.cydian.com. ( 0406181342 3600 1800
604800 86400 )
@ NS    ns1.cydian.com.
@ NS    ns2.cydian.com.
        
@ A          208.34.50.251
@ MX         10
mail.dcstransusa.com.
mail A         
208.34.50.241
www A         
208.34.50.251

Am I missing something obvious here?

Thanks

Chris