problems sending mail

Submitted by dnieu on Mon, 04/05/2010 - 05:26

i get error message.

Client host rejected: cannot find your hostname, [196.xxx.xx.xx] (in reply

I presume this is a Reverse DNS error.

do i fix this on ubuntu or at my ISP ?

Forums: 
Ehcp General, uncategorized yet

ehcpdeveloper

Mon, 04/05/2010 - 21:10

it is on your ubuntu.
most probably, your server cannot resolve hostnames.
this is mostly,
/etc/resolv.conf file
it contains nameserver information
use:
nameserv localhost
nameserver 8.8.8.8

dnieu

Wed, 04/07/2010 - 02:19

Hi ehcpdeveloper,

Seems like the problem was with my ISP.
I have a router with 5 Static IP's, 3 ip's pointed to internal mail servers, with some domains.

I had to ask my ISP to setup reversed DNS for the domains on these 3 ip's.

The mail is going out now with no problem.
It seems like some mail servers look for the reverse DNS before excepting mail, to stop people in sending spam.

Thanks.
Derick

Regards,

Derick Nieuwoudt