[SOLVED] Add my ISP mail relay to my DNS configuration

procfs · 07-26-2011, 11:29 PM

Hi, I am trying to get ISP to relay mails for me if my mail server is not available and they are sking me to add their relay name in to my DNS configuration as
;; ANSWER SECTION:
mydomain.com. 82798 IN MX 10 relay.my_isp.net.mydomain.com. <== Wrong
mydomain.com. 82798 IN MX 5 server. mydomain.com.

Please correct this as

mydomain.com. 82798 IN MX 10 relay.my_isp.net.

Please tell me what I am doing wrong, my DNS configuration is as follows
$TTL 86400
$ORIGIN mydomain.com.
@ IN SOA ns1. mydomain.com. root. mydomain.com. (
2011072614 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum

IN NS ns1. mydomain.com.
IN MX 5 dn. mydomain.com.
IN MX 10 relay.my_isp.net.

IN A 203.143.41.98
ns1 IN A 203.143.41.98
dn IN A 203.143.41.98
…………………….. etc

bathory · 07-27-2011, 03:00 AM

Hi,

Quote:

;; ANSWER SECTION:
mydomain.com. 82798 IN MX 10 relay.my_isp.net.mydomain.com. <== Wrong

This happens if you forget the trailing dot after the FQDN of the mail exchange. In your case you have the dot, so it should work
Anyway you can increase the serial, reload bind flush cache and check:

Code:

rndc reload
rndc flush
dig MX mydomain.com @ns1.mydomain.com.

procfs · 07-27-2011, 04:28 AM

Hi bathory, thanks for the reply but its still the same!

bathory · 07-27-2011, 07:23 AM

Are you sure you're querying your name server? What's in /etc/resolv.conf?
Also, since you didn't used CODE tags to post the zone file, I cannot understand there are any blank space(s) in the NS, MX lines. Also there are blank spaces in the various hostnames (like ns1. mydomain.com. dn. mydomain.com.), that should not exist. You can try the following:

Code:

$TTL 86400
$ORIGIN mydomain.com.
@ IN SOA ns1.mydomain.com. root.mydomain.com. (
                                                   2011072615 ; Don't forget to increase it serial (d. adams)
                                                   3H ; refresh
                                                   15M ; retry
                                                   1W ; expiry
                                                   1D ) ; minimum

                                                   IN NS ns1.mydomain.com.
                                                   IN MX 5 dn.mydomain.com.
                                                   IN MX 10 relay.my_isp.net.

                                                   IN A 203.143.41.98
ns1                                             IN A 203.143.41.98
dn                                               IN A 203.143.41.98

Reload and run

Code:

dig SOA mydomain.com @ns1.mydomain.com
dig MX mydomain.com @ns1.mydomain.com

From the first you should check if you're using the correct zone file

Regards

procfs · 08-03-2011, 06:11 AM

Hi bathory, sorry took long to reply, there was a problem with the ISP side and they have rectified it

Thanks for your help

Best Regards