new ietf mail archive? permanent urls?

okay, I've finally belatedly noticed the new ietf mail archive.
(because I have a life these days.)

Is e.g.
https://mailarchive.ietf.org/arch/msg/ietf/GKYUQNOssvg-JIsPfj90_YI5r9w
a permanent url? If not, should it be?

(It's occasionally
useful to refer to emails directly, and cite text with urls, but
that doesn't look like a good choice. I mean, no date in url?
as a hint?)

thanks
 
Lloyd Wood
http://about.me/lloydwood