[dns-operations] Trustworthiness of PTR record targets

WBrown at e1b.org WBrown at e1b.org
Tue Mar 4 18:06:24 UTC 2014

Doug wrote on 03/04/2014 12:48:03 PM:

> 2. In my experience (which is not thorough, but also not zero) anti-spam 

> folks are completely uninterested in what's in the PTR, and generally do 

> not do any blacklisting by domain name in the sense you seem to mean.

Not exactly true.  Many insist that there is a valid PTR record.  Some 
care that it has a valid name, and that the forward lookup for that name 

RBLs however, only look at IP address.

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