Mx lookup

Hi,

I have installed postfix 2.5.1.

If I use the opendns service:
resolv.conf
nameserver 208.67.222.222
nameserver 208.67.220.220

the email that I try to send to unreal domain (i.e. yrcwed4r.it) go to  
the queue with
connection time out:
   (connect to yrcwed4r.it[208.67.217.132]:25: Connection timed out)
                                          soracchi <at> yrcwed4r.it

If I use the other DNS (my service provider) the email is bounced to  
sender correctly
(Host or domain name not found. Name service error for  
name=yrcwed4r.it type=AAAA: Host
found but no data record of requested type).

The problem seems to be in opendns service.

Can you help me.

Regards,

-- NETBUILDER S.R.L.
Andrea Soracchi- System Engineer
Tel. 0521-247791
Fax. 0521-7431140 / 0521 - 1851253
www.netbuilder.it