Re: PTR Records and hosting our own mail

From: Chester (chester_at_NOSPAMprosoundusa.com)
Date: 07/10/04 

Date: Sat, 10 Jul 2004 15:05:14 -0400

Hello Javier,
    I've read the article, and we used some of the links at the end to test
our server. Yes, we do have a PTR record, but it points to Company B who
owns the IP static IP addresses we use. So I gather that we need to contact
them like you mentioned. Now, do we ask them to change the PTR record for
our IP addresses to point to our domain (prosoundusa dot com)?
Sorry if this is elementary, I'm just trying to get my head wrapped around
exactly what to ask for.

Thanks!

Chester
"Javier Gomez [SBS MVP]" <javier_gomez@remove.this.engineer.com> wrote in
message news:e88ibSqZEHA.1508@TK2MSFTNGP09.phx.gbl...
> Can you post the NDR that you get when you try to send mail to the
> problematic domains?
>
> The last section of this article deals with determining if you have the
> proper PTR records (which for prosound dot com they are only "generic").
Is
> not just having PTR records, its having them match your domain. Also
> remember there are other reasons for being blacklisted.
> http://www.sbslinks.com/DNS_Smarthost.htm
>
> From your example you would have to contact Company B for getting the
proper
> PTR record (which are the ones that "owns" the IP range).
>
> --
> Javier [SBS MVP]
>
> << SBS ROCKS !!! >>
>
> "Chester" <chester@NOSPAMprosoundusa.com> wrote in message
> news:O0UDpxpZEHA.3664@TK2MSFTNGP12.phx.gbl...
> > Hello,
> > We are hosting our own mail on our SBS2k3, and using DNS to send mail.
> (Not
> > through a SmartHost).
> >
> > However, there are several domains that have been rejecting our mail,
> > apparently using ReverseDNS, and finding that our domain (prosoundusa
dot
> > com) is not hosted at the mail server's IP address.
> >
> > We tried sending mail to those troublesome domains through a SmartHost,
> but
> > still no luck, the messages still got refused!
> >
> > To complicate matters,
> >
> > Company A hosts our domain/website,
> > Company B provides our DSL (w/static IP),
> > Company C contracts with Company B to provide mail services to the DSL
> > accounts (We don't use their mail, but POP and SMTP accounts are
> available),
> > We have a DynDns account to associate a domain name with our static IP,
> > and WE host our own mail server! Complicated enough?
> >
> > So, the question is, what can we do so that reverse DNS lookups (or
> whatever
> > these troublesome domains are using to decide to reject our mail)
resolve
> to
> > our mail server's IP or Domain name?
> >
> > Is it the PTR? If so, WHO in the above list is responsible for that
> record?
> >
> >
> > Thanks!
> >
> > Chester
> >
> >
>
>

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