How reply the same MX RRs list for all kind of MX request

[Frank Abel Cancio Bello]

Hi all,

First at all, I'm newbie in DNS, so excuse me if I'm posting something 
stupid here ;)

I want DNS replying the same list of MX RRs for all MX request. I mean, 
any client that want send an email and query my DNS for a MX RRs must 
get the same MX RRs, not matter of what domain the client is requesting 
the MX RRs. Is that possible in any way?

Thanks in advance.

Cheers
Frank Abel