On 05/02/2013 10:28 AM, Jim Shupert wrote:
Friends,
I have a few addresses ( domains ) that I have trouble delivering to.
I get a return of
Hi. This is the qmail-send program at sifter.pps-inc.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<sombody.somedom.com> <mailto:[email protected]>:
Sorry, I couldn't find any host by that name. (#4.1.2) I'm not going to try
again; this message has been in the queue too long.
I think I have fixed it. We recently changed isp and had some dns issuees
My previous bind.conf was contrained to do dns as udp on port 53 only - and
now will do a high port range.
My Question is -
how can I tell if my mail server is running bind on the mail server.
As I recall at the time of install I could do bind locally , or dbjns locally
or point to an external dns server.
Is that Right?
how can I check this?
Thanks
js
Jim,
It's important to differentiate between authoritative and recursive DNS.
They are 2 different roles, which should be implemented by different
servers. While they can both be implemented on the same DNS server,
doing so is not recommended (it's very complicated even for experienced
admins.
Your QMT host should have a recursor/rexolver running on it for best
performance. This can be provided by the caching-nameserver package
(bind) or pdns-recursor (PowerDNS). Personally I use the later. In
either case, you should have
nameserver 127.0.0.1
in your /etc/resolv.conf file, indicating that there is a resolver
running on the localhost.
Setting up DNS records for your domain(s) should be handled on a
separate authoritative DNS server. You're required to have at least 2
servers for authoritative records, so it's common for this to be done by
a DNS service, unless you're running 2 or more authoritative DNS servers
yourself.
HTH.
--
-Eric 'shubes'
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