[CentOS] sendmail question
geisj at pagestation.com
Wed Oct 21 19:51:00 UTC 2009
Brent L. Bates wrote:
> It is not odd. You just refuse to listen to those trying to help. How
> many times do they have to say `Check your DNS'?
> Check your /etc/nsswitch.conf and make sure it has a line like this:
> hosts: files dns
> `files' comes FIRST and `dns' LAST.
> The file /etc/resolv.conf should have a line starting with `domain' and
> have your domain after it. You should have at least one `nameserver' line.
> If you are running `named' on your local system then put `127.0.0.1'. You
> can have up to 3 `nameserver' lines.
> Finally, your /etc/hosts file should have a line like this:
> 127.0.0.1 localhost loopback me
> You should also have lines that correspond with each and every IP address
> the system is using. For example:
> 18.104.22.168 myhost.mydomain.com myhost
> List the Fully Qualified Domain Name (FQDN) FIRST and then the short
> Use things like `ping' and `nslookup' to make sure DNS is working. If
> these take forever, 2 minutes for example, your DNS isn't working and you need
> to fix it.
> One last thing, your mail queue shouldn't be any shorter than 15 MINUTES.
> If you are sending out the the Internet and it is much shorter, you will
> probably end up on someones SPAM list.
nsswitch.conf has in it the following:
#hosts: db files nisplus nis dns
hosts: files dns
I do not have any domain line in /etc/hosts just 2 nameservers.
/etc/hosts has 127.0.0.1 localhost
I do also have the line with the correct IP for the machine.
IP address space full machine name short name also.
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