[dns-operations] DNS MX queries with '@'

[Stephane Bortzmeyer]

On Mon, Apr 13, 2009 at 03:47:20PM -0400,
 Kaio Rafael <kaiorafael at dcc.ufam.edu.br> wrote 
 a message of 37 lines which said:

> i noted that some MX type queries are using in the QNAME field the
> at ('@') character,

BTW, I tried to use dnscap to capture such packets and it seems that
using -x @ captures *every* DNS packet. To me, @ is not a special
character for regexps and I do not see what's wrong:

# dnscap -g -i eth1 -x '@'  
[Every DNS packet is displayed, whatever the QNAME]