Commercial Exim
Here are a list of companies, in no particular order, who provide commercial Exim offerings. Any company can be added to this list. The companies on this list are not necessarily endorsed or recommended by the Exim group.
http://www.it-schulungen.com/seminare/opensource/exim/index.html - We offer Exim training from project experienced trainers as well as other open source technologies.
http://cardwellit.com/ - We offer Exim consultancy. We can design, build and modify complex Exim configurations.
http://support.cpanel.net - We offer direct support for all cPanel & WHM license owners, including Exim configurations and support.