Email & PTR Issues

Barry Margolin barmar at
Wed Nov 8 17:54:39 UTC 2017

In article <mailman.15.1510077615.749.bind-users at>,
 Matthew Pounsett <matt at> wrote:

> I'm presuming is your ISP.  You either need to get them to
> delegate reverse DNS for your address block to you, or have them set up the
> PTR record(s) you require in their DNS.

If you have residential Internet service, I'd estimate the chances of 
either to be 0%. This kind of thing is generally only provided to 
business accounts.

What's strange, though, is that they don't have some kind of generic 
reverse DNS for the address. Like my Comcast IP has reverse DNS that 
resolves to

Barry Margolin
Arlington, MA

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