I recentely saw this EU-study about open source software. Inside it I found a link pointing to Falko's email server survey: http://www.falkotimme.com/projects/survey_smtp_032004.php The study can be fond here and Falko's survey is referred to in footnote 18: http://ec.europa.eu/enterprise/ict/policy/doc/2006-11-20-flossimpact.pdf
