Re: how does mailx work

[Carlo Florendo <list-subscriber at hq dot astra dot ph>]

Dave Korn wrote:

> ----Original Message----
>
>
> > Hello,
> >
> > I've searched the net for mailing lists regarding mailx but there seems
> > to be none.   Then why ask about it in cygwin-talk?  Well, since it is
> > off-topic on the cygwin list and I might as well try my luck here, where
> > all of you are intelligent.
> >
> > Here's the question:  How does mailx know which MX to use?  I've got a
> > linux box with the hostname test.mybox.org.  Now, whenever I invoke
> > "mail <user>@mybox.org", it delivers the mail to <user>'s mailbox in the
> > local machine.  How come it thinks that mybox.com is the local machine?
> > The local machine is test.mybox.org but *not* mybox.org.
> >
> > Any ideas?
> >
> >    
>
>  MX records tend to be per-domain rather than per-host anyway.  Your local
> dns server will presumably be returning a suitable record.  Show us the
> output from 
>
>
> dig @localhost mybox.org in mx
>
>
>    cheers,
>      DaveK
>  

Btw, my boxes that end with [m y b o x] <dot> [o r g] are machines that 
are not connected to the net.  I set up the domains for testing.   After 
some googling, I realized that here is a real m y b o x.o r g domain.  
So, to prevent search engines from web-spidering this posting and 
relating it to  the real m y bo x <dot> org,  I type the name with 
spaces.  I and the institution I work for are not in anyway related to 
the owners nor managers of that domain.  All the setup was plain 
coincidence.

I must probably change my test domain names now since I might be 
infringing copyrights or trademarks. 

Here's the result of dig.  I did a vim search and relpace on the output 
so please read M Y B O X as what it should be, w/out the spaces.

dig @192.168.10.10 m y b o X <dot> org in mx
; <<>> DiG 9.3.0 <<>> @192.168.10.10 M Y B O X.org in mx
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51995
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 3

;; QUESTION SECTION:
;M Y B O X.org.         IN  MX

;; ANSWER SECTION:
M Y B O X.org.      259200  IN  MX  10 mail.M Y B O X.org.
M Y B O X.org.      259200  IN  MX  20 mail2.M Y B O X.org.

;; AUTHORITY SECTION:
M Y B O X.org.      259200  IN  NS  ns1.M Y B O X.org.

;; ADDITIONAL SECTION:
mail.M Y B O X.org. 259200  IN  A   192.168.10.6
mail2.M Y B O X.org.    259200  IN  A    192.168.10.7
ns1.M Y B O X.org.  259200  IN  A   192.168.10.10

;; Query time: 1 msec
;; SERVER: 192.168.10.10#53(192.168.10.10)
;; WHEN: Fri Apr 29 10:20:20 2005
;; MSG SIZE  rcvd: 138

HTH.

btw, [m y b o x] <dot> [o r g] is a local machine which is not connected 
to the net.  I set up the domains for testing.   After some googling, I 
realized that here is a real  m y b o x.or g domain.  However, I and the 
institution I work for are not in anyway related to the owners nor 
managers of that domain.  All the setup was plain coincidence.

I must probably change my domain names now since I might be infringing 
copyrights or trademarks. 

Thanks!

Gee, you cygwin gurus are my favorite, really :)

Best Regards,

Carlo                


--
Carlo Florendo
Astra Philippines Inc.
www.astra.ph