Re: new plugin: helo

On Fri, 15 Jun 2012, Matt Simerson wrote:

> > In my experience, reverse DNS is frequently managed (or, frequently, not 
> > managed) by an ISP, not by the admin of the mail server.
> 
> In my experience, every ISP that provides clients with dedicated IPs 
> also provides the client with the ability to manage the reverse DNS for 
> them.

My ISP (a smallish not-for-profit affair) claims to be unable to do that. 
I've heard of and seen other ISPs which fail also. I agree that most ISPs 
offer this service. A single exception is sufficient to say this can't be 
guaranteed.

> Either via a support request or automated means.  I did when I 
> owned my ISP in the early 90s, and every ISP and hosting provider I've 
> ever worked for or with since does as well. The good providers even 
> provide rwhois on the delegated IP space and automatically populate it 
> with the clients billing data. (see RFC 1941).

Yes, good providers do that.