<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks Lyle,<div>You're right - I started using the host command because it was giving me the error I found in the postfix logs... </div><div>but as I just discovered dig +trace also give me the error...</div><div><br></div><div>I am seeing lots of mailed messages to gmail accounts... and when I do a trace I get the following:</div><div><br></div><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><div>; <<>> DiG 9.7.3 <<>> +trace mx <a href="http://gmail.com">gmail.com</a></div></div><div><div>;; global options: +cmd</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://m.root-servers.net">m.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://c.root-servers.net">c.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://h.root-servers.net">h.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://b.root-servers.net">b.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://e.root-servers.net">e.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://j.root-servers.net">j.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://k.root-servers.net">k.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://g.root-servers.net">g.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://f.root-servers.net">f.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://i.root-servers.net">i.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://l.root-servers.net">l.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://a.root-servers.net">a.root-servers.net</a>.</div></div><div><div>.<span class="Apple-tab-span" style="white-space:pre"> </span>501632<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://d.root-servers.net">d.root-servers.net</a>.</div></div><div><div>;; Received 320 bytes from 127.0.0.1#53(127.0.0.1) in 0 ms</div></div><div><div><br></div></div><div><div>;; connection timed out; no servers could be reached</div></div></blockquote><div><div><br></div><div><br></div><div>If I leave the trace off, I see no error messages... but I get no answer and I do see a warning:</div><div><br></div></div><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><div><div>; <<>> DiG 9.7.3 <<>> mx <a href="http://gmail.com">gmail.com</a></div></div></div><div><div><div>;; global options: +cmd</div></div></div><div><div><div>;; Got answer:</div></div></div><div><div><div>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32902</div></div></div><div><div><div>;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 5</div></div></div><div><div><div>;; WARNING: recursion requested but not available</div></div></div><div><div><div><br></div></div></div></blockquote><div><div><br></div><div><br></div><div><br></div><div><br></div><div><div>On May 2, 2012, at 1:42 PM, Lyle Giese wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On 05/02/12 12:12, Paul Marais wrote:<br><blockquote type="cite">Hi,<br></blockquote><blockquote type="cite">I'm having an issue where my postfix server is having trouble with some lookups.<br></blockquote><blockquote type="cite">When I type 'host<hostname>', 80% of the time I get decent reply speed, but for 20% I get a 5 second delay, or even a timeout.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">My nameserver is configured to only allow recursion for hosts on my local network, and I have my ISP dns in my forwarders.<br></blockquote><blockquote type="cite">My resolv.conf has 127.0.0.1, my internal ip, and the ip for my isp DNS<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Any help will be greatly appreciated.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Thanks<br></blockquote><blockquote type="cite">Paul<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote>Don't use host. It's not telling us what is going wrong and it's only doing an A record lookup of host name.<br><br>Postfix does an MX lookup for the domain and then an A record lookup for the mail server(s) in the MX records.<br><br>Learn to use dig.<br><br>Do this:<br><br>dig mx <a href="http://example.com">example.com</a><br><br>If the answer is <a href="http://mail.example.com">mail.example.com</a> do this:<br><br>dig mx <a href="http://example.com">example.com</a><br><br>if either fail do this:<br><br>dig +trace mx <a href="http://example.com">example.com</a><br>or<br>dig +trace <a href="http://mail.example.com">mail.example.com</a><br><br>And see if you can catch the failure and then we can do more for you. The other side of this may be that your Internet connection is overloaded and you are dropping packets or it's taking too long for the query to get out and get the response.<br><br>Lyle Giese<br>LCR Computer Services, Inc.<br><br>_______________________________________________<br>Please visit <a href="https://lists.isc.org/mailman/listinfo/bind-users">https://lists.isc.org/mailman/listinfo/bind-users</a> to unsubscribe from this list<br><br>bind-users mailing list<br><a href="mailto:bind-users@lists.isc.org">bind-users@lists.isc.org</a><br>https://lists.isc.org/mailman/listinfo/bind-users<br><br></div></blockquote></div><br></div></body></html>