[ih] rDNS, was The Decline and Fall of Internet Email?

[John Levine]

It appears that Dave Crocker via Internet-history <dcrocker at bbiw.net> said:
>Reverse DNS has certainly become a requirement for domains used for 
>abuse-affected services.  So, yeah. Required.
>
>    */If there really is a significant barrier to obtaining or
>    maintaining an entry, it would be worth an effort to make sure its
>    availability is universal, cheap, easy, and reliable./*

rDNS basically comes for free with a RIR IP allocation. What happens
after individual IPs are assigned to customers is highly variable.

These days it's hard to make an argument for running a mail server at
home, unless you have a rather unusual home. The external appearance
of a mail server is close enough to that of a botnet that most retail
ISPs deliberately block port 25 since that stops a lot of abuse.

You can get a perfectly good VPS for $5 or $10/mo with a static IP and
rDNS from many hosting providers. That's the reasonable approach now.

R's,
John