That's bad sincd DNAME is deprecated and has been removed from BIND.
--On Friday, January 14, 2005 10:05 +1100 Mark Andrews
What is wrong with MTAMARK?
As currently described it doesn't fit well with RFC 2317
style delegations. They would need to be converted to use
DNAME instead of CNAME which requires all the delegating
servers to be upgraded to support DNAME.
There are other issues but hear is not the correct place
to debate them.
If this message was not signed with gpg key 0FE2AA3D, it's probably