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Re: [PLUG] DNS Reverse Mappings
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On Mon, 25 Feb 2002, Jesse Schultz wrote:
I was aware of that. I wonder if the reason I have never experienced this
is that my secondary MX is reverse DNS qualified. Does sendmail fail
entirely or drop to the secondary MX upon reverse DNS failure?
Doug
>
> Some mail servers will regect a message based on a reverse lookup
> failure. This is just one example.
>
> - ----- Original Message -----
> From: "Doug Crompton" <wa3dsp@crompton.com>
> To: <plug@lists.phillylinux.org>
> Sent: Monday, February 25, 2002 1:15 AM
> Subject: [PLUG] DNS Reverse Mappings
>
>
> >
> > Can someone tell me what consequenses of NOT having reverse DNS
> > are? I have a small (block of 8) subnet supplied by a friend who
> > has a class C supplied to him. The class C is not registered
> > reverse IP. It never has been, I have been using it for years. I
> > can remember at one time maybe not being able to FTP somewhere but
> > never since. The problem is this guy is lazy and it is not him but
> > rather the supplying provider to him that must register it. I doubt
> > that will ever happen.
> >
> > If one were running say DSL with 1 IP address. I assume that
> > address would be reverse DNS'ed by the provider. Does that name
> > have to match the forward DNS that I would do locally? Does anyone
> > nameserve on 1 IP address? I would be namserving 10's of domains
> > and returning one IP address - virtual serving.
> >
> > Doug
> >
****************************
* Doug Crompton *
* Richboro, PA 18954 *
* 215-431-6307 *
* *
* doug@crompton.com *
* wa3dsp@wa3dsp.ampr.org *
* http://www.crompton.com *
****************************
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