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Re: [cobalt-users] Reverse DNS & Sendmail (gethostbyaddr)
- Subject: Re: [cobalt-users] Reverse DNS & Sendmail (gethostbyaddr)
- From: "Gerald Waugh" <gerald@xxxxxxxxx>
- Date: Fri Sep 14 18:07:31 2001
- List-id: Mailing list for users to share thoughts on Cobalt products. <cobalt-users.list.cobalt.com>
> I keep seeing this error
>
> Sep 14 05:36:38 sendmail[7380]:
> gethostbyaddr(xxx.xxx.xxx.xxx) failed: 1
>
> If I perform a reverse DNS lookup on the IP in
> question I get this
>
> xxx.xxx.xxx.xxx has no reverse DNS configured.
>
> But I "do" have a PTR record on the IP pointing to the
> domain, so why would it not reverse correctly?
>
Has the IP been delegated to you?
Do you have a class 'C'?
Check with the ISP that you lease the IP from.
Some people think that reverse is not important,
but it *is* an indication of poor administration.
Gerald