why IPv6 isn't ready for prime time, SMTP edition

[johnl at iecc.com (John Levine)]

>I'm sure you are as vocal about outright rejecting messages for lack of 
>SPF (even if softfail) and lack of DKIM as you are about requiring rDNS?

Interesting guess, but completely wrong.

>Or perhaps making TLS mandatory, outright rejecting cleartext.

Not until we have SMTP DANE.

>Seems like the logical next step...    Maybe too much overkill though, 
>right? Hard to define when you cross over that line.

It's up to you.  If you want people to accept your mail, you can send
it the way they tell you to send it, since they are doing you a favor
by accepting it all.  If you just want to complain, I guess you post
to nanog instead.

R's,
John