[dns-operations] Trustworthiness of PTR record targets

[WBrown at e1b.org]

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 
matches. 

RBLs however, only look at IP address.



Confidentiality Notice: 
This electronic message and any attachments may contain confidential or 
privileged information, and is intended only for the individual or entity 
identified above as the addressee. If you are not the addressee (or the 
employee or agent responsible to deliver it to the addressee), or if this 
message has been addressed to you in error, you are hereby notified that 
you may not copy, forward, disclose or use any part of this message or any 
attachments. Please notify the sender immediately by return e-mail or 
telephone and delete this message from your system.