Getting two service principals, one of them with an empty realm

[Rahul Amaram]

Hi,
I am strangely getting two service principals for every service I use 
and one of them has an empty realm. Below is a sample output.

$ klist
Ticket cache: FILE:/tmp/krb5cc_1001_Xc3DVv
Default principal: xxxxxx at SYNOVEL.COM

Valid starting     Expires            Service principal
06/02/10 11:45:07  06/02/10 21:45:07  krbtgt/SYNOVEL.COM at SYNOVEL.COM
     renew until 06/03/10 11:44:57
06/02/10 11:45:27  06/02/10 21:45:07  imap/scs.synovel.com@
     renew until 06/03/10 11:44:57
06/02/10 11:45:27  06/02/10 21:45:07  imap/scs.synovel.com at SYNOVEL.COM
     renew until 06/03/10 11:44:57


Kerberos 4 ticket cache: /tmp/tkt1001
klist: You have no tickets cached


The hostname to realm mapping and realm kdc details are obtained 
completely through DNS (using TXT and SRV records).

Any help in this regard would be appreciated.


Regards,
Rahul.