Re: gethostbyaddr
| From: | Andreas Pour | Date: | Sat, 22 Jul 2000 15:32:53 +0000 |
| Subject: | Re: gethostbyaddr | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-7684@lists.php.net to get a copy of this message | ||
Dave Reinhardt wrote:
>
> Can anyone tell me what these mean?
> >from /vat/log/maillog
> Jun 1 21:40:07 localhost sendmail[26785]: gethostbyaddr(216.94.9.6) failed: 1
> Jun 1 21:40:07 localhost sendmail[26785]: gethostbyaddr(216.94.10.7) failed: 1
> Jun 1 21:40:07 localhost sendmail[26785]: gethostbyaddr(209.47.225.9) failed: 1
> Jun 1 21:40:07 localhost sendmail[26785]: gethostbyaddr(134.251.10.11) failed: 1
> I know it failed, what is causing it or what do I do to find it.
What's causing it? Either sendmail can't find a DNS server -- in which
case your mails should not be getting delivered at all -- or, more
likely, the hosts in question don't have a reverse zone file set up for
them (this is a file that permits a DNS query asking what the name of a
host at a particular Internet address is). This is often the case
especially for DSL and cable modem lines, as the ISP does not on its own
update its zone files if someone changes their host name from the
assigned one.
Ciao,
Andreas