On 1/28/2016 11:15 AM, Brian E Carpenter wrote: >> +1. For example, I cannot find this on IETF's site: >> > https://web.archive.org/web/20070707120539/http://tools.ietf.org/html/draft-ietf-drums-smtpupd-00 > Then you didn't look in the right place: > > https://tools.ietf.org/id/draft-ietf-drums-smtpupd-00.txt > > However, there are missing I-Ds from 1994 or earlier, from the days when > ftp was the only method and expired drafts were taken off line immediately. > The Wayback machine also only goes back so far. > > Brian Some IDs were written before the IETF asserted its right to archive and provide access to them indefinitely through copyright transfer. The original authors had the right to prohibit distribution of that material, and some (myself included) have asserted that right vigorously. I.e., it's not merely a matter of what was "lost" but also "who has the right". Joe