When you use smarthost:
define(`SMART_HOST', `smtp:my.isp.com')
^^^^^^^^^^
You're using a domain name. Your computer has to have some way of
resolving that name to an IP number. It does that in one of the following
ways:
1) You can set your configuration up so that your system has access to
your ISP's nameserver so you can resolve any legitimate domain name. From
linuxconf:
DNS usage [X] DNS is required for normal operation
default domain
IP of name server 1 204.147.80.1
IP of name server 2 (opt) 204.147.80.5
IP of name server 3 (opt)
2) or etc/resolv.conf:
$ less /etc/resolv.conf
nameserver 204.147.80.1
nameserver 204.147.80.5
3) or set individual computer ISP/host name pairs up in /etc/hosts
$ less /etc/hosts
204.147.80.1 usworst.net worst
204.147.80.5 qworst.net qworst
If you haven't done any of the above Sendmail can't find your ISP's 'net
address, hence the error message.
Glen
On Tue, 15 Aug 2000, Christopher Northrop wrote:
>Hello group
>
>I thought that setting the Smart relay in the sendmail.cf would get ride of
>this error..
>
>"Deferred: Name server: other.host.on.net: host name lookup failure."
>
>Guess not, The DS setting works on the Hp 10.20 but not Linux. Does any one
>know why?
>
>Chris N.
>
>
>
>
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