[AusNOG] PTR Records

[Skeeve Stevens]

As one of the fathers of BIND and DNS, Mark knows his stuff :)


...Skeeve

*Skeeve Stevens - *eintellego Networks Pty Ltd
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On 18 November 2014 12:34, Mark Andrews <marka at isc.org> wrote:

>
> In message <
> CAM9f+Zw4fbWXbr2gne0iLWppywN-oU32Uf4P3H17M1cK3D+JLw at mail.gmail.com>,
> David Beveridge writes:
> >
> > Can anyone point me to any RFC which says that there are restrictions on
> > the name a PTR can point to.
> >
> > I have been told by a certain ISP that I cannot have a PTR pointing to
> > mycompany.com.au as it is NON-standard and which cannot and should not
> be
> > done.  They insist on setting the PTR to mail.mycompany.com.au and
> refuse
> > to do as I ask.
> >
> > I have never heard of any such thing.
> >
> > dave.
>
> There isn't such a restriction.
>
> That said if you are sending email from mail.mycompany.com.au and
> it announces itself as mail.mycompany.com.au in the HELO / EHLO
> then it would be wise for the PTR record to be mail.mycompany.com.au
> and for there to be A/AAAA records for mail.mycompany.com.au.
>
> If your mail server announces itself as mycompany.com.au then the
> PTR record should be set to mycompany.com.au.
>
> Mark
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org
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