gethostbyaddr Error

[SoloCDM]

Mark.Andrews at nominum.com stated the following:
> 
>         Complain to your ISP that the dialup (or whatever it) pool
>         does not have reverse entries in the DNS.

Is that the only way to fix the problem?  Is there anything I can do
at my end?

> > The following error occurs in /var/log/maillog:
> >
> > sendmail[32602]: gethostbyaddr(204.118.157.122) failed: 1
> >
> > Because I'm connected to an ISP, the last set of numbers (after
> > the last period) change with every ISP connection, so how can I
> > put a generic entry in DNS?  The host is either mail.aculink.net
> > or aculink.net . . . I just don't know which is more appropriate
> > or standardization.

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SoloCDM