At 02:56 15-02-10, Per Jessen wrote:
I went to google "mtamark", and came across a few discussions on mailing lists (e.g. at www.sage.org) as well as an article in iX (German IT magazine) in 2005. The proposal was certainly discussed quite a bit, but it's not very clear what then happened. I also saw a few links to personal pages at space.net, but they're long gone.
There is experimental support for MTAMARK in a well-known MTA. The proposal had less exposure than SPF.
Regards,-sm
