Sendmail host name lookup failure
Marcus O. White
1lnxraider at comcast.net
Thu May 26 10:41:09 UTC 2005
Have you looked in the /var/log/maillog or /var/log/messages for
additional information. This could also be a DNS issue, where the Yahoo
mailserver attempts to perform a reverse lookup of the sending server.
The other thing that you may want to do is use your ISP's mailserver as
a "smart relay". This would require modifying your /etc/mail/sendmail.cf
file.
Marcus O.
On Thu, 2005-05-26 at 09:17 +1200, Cameron Beattie wrote:
> I have a number of undelivered messages in the mailqueue. The mailqueue
> reports: Deferred: Name server: yahoo.com.: host name lookup failure. I
> attempted to send these emails from a remote client (Outlook Express) and
> cannot understand why the domain name can't be discovered.
>
> nslookup yahoo.com.
> Server: 210.55.12.1
> Address: 210.55.12.1#53
>
> Non-authoritative answer:
> Name: yahoo.com
> Address: 66.94.234.13
>
> echo test | sendmail -v user at yahoo.com
> <snip>
> 250 2.0.0 <.ID.> Message accepted for delivery
> </snip>
>
> /etc/resolv.conf:
> nameserver 210.55.12.1
>
> /etc/hosts
> 127.0.0.1 servername localhost.localdomain localhost
>
> Don't know if the following is relevant
> service nscd status
> nscd is stopped
>
> Any help would be appreciated.
>
> Regards
>
> Cameron
--
Marcus O. White <1lnxraider at comcast.net>
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