Problem in sending mail

[Gregory Hicks]

> Date: Mon, 24 Jan 2005 15:09:23 -0800 (PST)
> From: Swapana Ghosh <swapana_ghosh at yahoo.com>
> Subject: Re: Problem in sending mail
> To: Kerry Thompson <kerry at security.geek.nz>, bind-users at isc.org
> 
> Thanks.
> 
> I have talked to our ISP. I have given few of our mailservers' ip and domain ,
> just to start with. They created the Reverse/PTR with valid ip and name. But
> still i am seeing that mail to the domain *vix.com* are rejected. 

Well...  If Paul had done a lookup on your address, it takes time for
the entry to "time-out" in his cache.  You and your ISP's servers may
have been updated, but it takes time for the rest of the world to catch
up...

Give him, say, 24 hours and try again.  I'm still getting this from my
stub resolver:

139.242.251.206.in-addr.arpa	name = 
hindunet-hindunet_inc-206-251-242-139.webcc.net

Authoritative answers can be found from:
242.251.206.in-addr.arpa	nameserver = ns.adnc.com
242.251.206.in-addr.arpa	nameserver = ns2.adnc.net
ns2.adnc.net	internet address = 206.251.228.24

while my ISP gets this:  (This is the first lookup I did at my ISP...)

139.242.251.206.in-addr.arpa	name = somnath.ghen.net
242.251.206.in-addr.arpa	nameserver = ns.adnc.com
242.251.206.in-addr.arpa	nameserver = ns2.adnc.net

I can tell you from experience that DNS, while it propagates changes
quickly, is not instantaneous.

Regards,
Gregory Hicks

> 
> Pl. suggest.
> 
> Thanks again
> -Swapna
> 
> --- Kerry Thompson <kerry at security.geek.nz> wrote:
> 
> > From here:
> > 
> > $ host 206.251.242.139
> > 139.242.251.206.in-addr.arpa domain name pointer
> >   hindunet-hindunet_inc-206-251-242-139.webcc.net.
> > 
> > $ host hindunet-hindunet_inc-206-251-242-139.webcc.net
> > Host hindunet-hindunet_inc-206-251-242-139.webcc.net not found: 3(NXDOMAIN)
> > 
> > vix.com is possibly checking the reverse/PTR record, then doing a check of
> > the forward record from that. If you could get your ISP to fix your
> > reverse ptr record so that it points to a valid forward record then all
> > should be well.
> > 
> > Kerry
> > 
> > 
> > Swapana Ghosh said:
> > > Hi ,
> > >
> > > I am having problem in sending mail to the domain *vix.com* ,from our
> > > mail server IP,  206.251.242.148.
> > >
> > > Previously i faced problem to *aol.com* ,later on  found, that our ISP did
> > > not
> > > create the *reverse ptr* for our IP block. They created later on and we
> > > could
> > > able to send the mails to aol.com . But now facing problem in sending mail
> > > to
> > > the  *vix.com*.
> > >
> > > Here is the error message i am mentioning while it was rejected:
> > >
> > > __________________________________________________________
> > > @4000000041f51764157a023c delivery 6935599: failure:
> > >
> >
> 
204.152.187.1_does_not_like_recipient./Remote_host_said:_550_Client_host_rejected:_ca
nnot_find_your_hostname,_[206.251.242.139]/Giving_up_on_204.152.187.1./
> > > __________________________________________________________
> > >
> > > Any pointer will be really appreciated.
> > >
> > > Thanks in advance.
> > > Swapna
> > >
> > 
> > 
> 
> 
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---------------------------------------------------------------------
Gregory Hicks                           | Principal Systems Engineer
Cadence Design Systems                  | Direct:   408.576.3609
555 River Oaks Pkwy M/S 6B1             | Fax:      408.894.3479
San Jose, CA 95134                      | Internet: ghicks at cadence.com

I am perfectly capable of learning from my mistakes.  I will surely
learn a great deal today.

"A democracy is a sheep and two wolves deciding on what to have for
lunch.  Freedom is a well armed sheep contesting the results of the
decision." - Benjamin Franklin

"The best we can hope for concerning the people at large is that they
be properly armed." --Alexander Hamilton