On 15 Jul 2014, at 23:13, Michael M Slusarz <slus...@curecanti.org> wrote:
>>> For the "more than 50% market share" of Dovecot / Cyrus, do you have a >>>> breakdown by version number? At least in terms of 1.* vs 2.0 and higher? >>>> >>> >>> I do not. >> >> >> And without being able to get a version number from a Dovecot session (or >> so it seems to me -- nothing returned from ID...).... it looks kind of sad. > > ID extension is pretty much worthless for version identification. It is > trivially spoofed -- and some servers do exactly this in the real world. All > it takes is one server/version to be spoofed to make that data worthless. > > It's possible to do some level of basic version sniffing by things like > banner messages, Human-readable responses, CAPABILITY lists, and ordering of > responses to various commands. However, this is really only useful for broad > statistical surveys and not precise version determination. Here are some interesting results based on such survey: http://openemailsurvey.org/dovecot-versions.png
