AFAIK everything I've talked about is described in an RFC somewhere. Indeed,
the problem isn't that it's not there, it's that there's too much and it's
difficult for inexerienced people to match up the right capabilities and
architecture to solve a given problem.
That may well be so. It may be that all that's needed (by me anyway) is a
document of some sort that points out where all this stuff is. Having read the
SMTP documents pretty closely recently, there is definitely a substantial
amount of stuff in there that I don't see implemented in systems that are
available to me. However, I am fairly sure that there are in fact gaps in the
docs in terms of the features i want to see. Even if I'm wrong, I think it's
worth going through the exercise of figuring that out. By which I do not mean
"go do some work for me." I'm interested in this and willing to do work, but
as I'm sure you've gathered, I do not have a complete picture of what's been
documented and what hasn't been.