On Wed, 2019-02-20 at 13:09 -0800, Mike Wright wrote:
> [snip]
> You didn't have a dns delegation-of-authority which allows you to
> claim 
> control or the mail server's reverse dns address and showing you're
> not 
> some fly-by-night spammer or some such.
> 
> If your were to dig for the PTR record for the mailserver's IP you
> would 
> get back something like 75-25-207-10.lightspeed.sjcpca.sbcglobal.net 
> that indicates who is currently in charge of that IP.  If you had
> the 
> delegation-of-authority it would return YOUR mailserver's name.
> 
> e.g.
> 1st record shows name of mailserver for your domain
> 2nd record shows address of mailserver
> 3rd record ties the mailserver's address to it's IP
> 
> forward dns:  yourchurch.org              IN MX  mx.yourchurch.org
> forward dns:  mx.yourchurch.org           IN A   192.168.10.20
> reverse dns:  20.10.168.192.in-addr.arpa  IN PTR mx.yourchurch.org
> 
> The delegations are usually available from your ISP if you're
> persistent 
> and may come with a monthly fee.  AT&T used to charge me $5 US but 
> raised it to $15 because they could.  Good bye AT&T, hello Digital 
> Ocean: $5 for a basic server includes a delegated authority record.
> 
> 


Yes!  Now that you mention it, that's the buzzword I was blanking on. 
My mistake was that I thought that the delegation of authority was a
configuration issue and I kept trying different ways of assigning it to
myself in the bind configuration files and nothing worked.  I got to
that horrible point of just making random changes in random
configuration files just to see if anything would change, and then gave
up.  I completely missed that I had to go to the ISP to get it.

Sigh.  That's part of my life I'll never get back.


billo
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