"Sender address reject: Domain not found" Error

[YMTan]

We noticed for some of our clients while sending emails to certain recipients, they get undelivery bounced mail like the following:-

111.222.333.444 does not like recipient.
Remote host said: 450 4.1.8 <[email protected]>: Sender address rejected:
Domain not found
Giving up on 111.222.333.444.

We notice that for all the domains hosted in our new DA server, we will get the same error from the targeted recipient server (like 111.222.333.444 above).

So I suspect it is something to do with DNS. Can anyone share some lights on this issue?

Thanks in advance.

 

[nobaloney]

This thread may help you understand how DNS looks.

But unless your clients are using something like [email protected], I can't see why your server would be attempting to send email to what looks like an IP#.

If you respond, please let us know what's really being returned, if it's really not 111.222.333.444.

Jeff

 

[YMTan]

Hi Jeff,

Sorry for the confusion. The 111.222.333.444 was a fake address for privacy purpose.

We found that the MX servers of targeted recipients always reject emails from our DA server using the very same error:

"450 4.1.8 : Sender address rejected: Domain not found"

I have followed the link you provided but couldn't figure out any flaw.
We setup local BIND (installed by DA) and put nameserver 127.0.0.1 in our /etc/resolv.conf.

Any input is welcome.

 

[nobaloney]

So let me understand this: you don't want to post your IP# because you want to keep it private, but you want everyone in the world to see your IP# because otherwise they can't find your server?

Makes no sense to me; perhaps this will help you.

We setup local BIND (installed by DA) and put nameserver 127.0.0.1 in our /etc/resolv.conf

If you're going to use your local DNS server you must set it up to be insecure. Your upstream connection provider should give you two IP#s of nameservers to use for resolving domain names you don't host, and you should put those IP#s into your resolv.conf file.

Jeff

 

[YMTan]

Thanks Jeff for the guidance.

The actual full error message is like below:-
135.12.16.16 does not like recipient.
Remote host said: 450 4.1.8 : Sender address rejected: Domain not found
Giving up on 135.12.16.16.

It happened while one client's user - [email protected] sending email to her client at [email protected].

Our DA server is 119.110.102.229 (ns10.jiix.net). We don't understand why the MX servers of celestica.com (chqsmt06.celestica.com - 135.12.16.16 & chqsmt05.celestica.com - 135.12.16.15) rejects all emails from our DA server, irregardless of the domains of the senders. That means, so long an email was sent from the domains hosted in this DA server, the recipient server will bounced back with the same error.

We have checked our DNS as well as our clients using http://www.intodns.com/ and other DNS checking tools. No error has been found.

Appreciate if anyone who'd similar experience to share some lights.

Thank you.

 

[nobaloney]

I wish I could tell you why they're not accepting your email. They're not accepting email from me to to david's address either. You'll have to contact their postmaster.

Jeff