gianpaolo racca wrote:
> 
> On Saturday 01 June 2002 19:58, J. Craig Woods wrote:
> > WRONG AGAIN! The mail server, smtp.mandrax.org is not, repeat *NOT*,
> > doing a reverse dns lookup on ip addresses (please see my *many* posts
> > on this issue).
> 
> So what's the meaning of this message?
> 
> <[EMAIL PROTECTED]>: host smtp.mandrax.org[63.209.80.243] said: 450
>     Client host rejected: cannot find your hostname, [111.222.333.444]
> 
> my public IP has obviously been hidden

Good thing you hid that ip address. I had to move my eyeballs all the
way up to the headers to see it :-)

What smtp.mandrax.org is doing is a *FORWARD* lookup. In essence, it ran
a
"nslookup your-hostname.domain", and this is what it got:

[drjung@sherman drjung]$ nslookup simpson.preciso.net
Note:  nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead.  Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
Server:         192.168.0.6
Address:        192.168.0.6#53

** server can't find simpson.preciso.net: NXDOMAIN

You see, you do not exist, so mandrax, rightly so, is not allowing mail
from you. You do not exist when I look you up on a dns server that is
out on the internet too:

[drjung@sherman drjung]$ nslookup -sil simpson.preciso.net 4.2.2.1
Server:         4.2.2.1
Address:        4.2.2.1#53

** server can't find simpson.preciso.net: NXDOMAIN

If you want to send mail to smtp.mandrax.org, you must first make sure
you register your domain name, and you must then have that name in the
address space of a dns server running on the internet (just ask Pierre
about this...grin). Some public dns server needs to "point" to your
hostname. I might be best to read up on domains, hostnames, and dns
records.

Good luck,
drjung
-- 
J. Craig Woods
UNIX/NT Network/System Administration
http://www.trismegistus.net/resume.html
Character is built upon the debris of despair --Emerson

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