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nslookup shows internet address = 127.0.0.1

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nslookup shows internet address = 127.0.0.1

Postby blin » Mon Jun 24, 2013 10:48 am

We are running Windows 2008 domain. Some of users receive Undeliverable returned email with this message: #554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##.

When I check the DNS status using nslookup on some of workstations, It shows mail.ejgallo.com internet address = 127.0.0.1

Workstation:

>nslookup

Default Server: 2008dc1

Address: 10.0.0.17

> set q=mx

> barefootwine.com

Server: 2008dc1

Address: 10.0.0.17

Non-authoritative answer:

barefootwine.com MX preference = 10, mail exchanger = mail.ejgallo.com

mail.ejgallo.com internet address = 127.0.0.1

> server 4.2.2.2

Default Server: b.resolvers.Level3.net

Address: 4.2.2.2

> barefootwine.com

Server: b.resolvers.Level3.net

Address: 4.2.2.2

Non-authoritative answer:

barefootwine.com MX preference = 10, mail exchanger = mail.ejgallo.com.

However, both of our DC/DNS doesn’t show mail.ejgallo.com internet address = 127.0.0.1

DC/DNS:

nslookup

Default Server: 2008dc1

Address: 10.0.0.17

> set q-mx

> barefootwine.com

Server: 2008dc1

Address: 10.0.0.17

Non-authoritative answer:

Name: barefootwine.com

Address: 50.19.110.254

Why the workstations show mail.ejgallo.com internet address = 127.0.0.1 but not DC/DNS?
How to Configure and Troubleshoot Cisco
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blin
Site Admin
 
Posts: 2861
Joined: Wed Dec 31, 1969 7:00 pm
Location: Chicago, USA

Re: nslookup shows internet address = 127.0.0.1

Postby blin » Mon Jun 24, 2013 10:49 am

1. Make sure all DNS servers work fine.
2. Run ipconfig /flushdns on the DNS server and client.
How to Configure and Troubleshoot Cisco
http://www.howtocisco.com

Tablet and Smartphone Setup Guide
http://www.quicksetupguide.com
blin
Site Admin
 
Posts: 2861
Joined: Wed Dec 31, 1969 7:00 pm
Location: Chicago, USA


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