No subject

$ 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:_cannot_find_your_hostname,_[206.251.242.139]/Giving_up_on_204.152.187.1./
> __________________________________________________________
>
> Any pointer will be really appreciated.
>
> Thanks in advance.
> Swapna
>