I do get too much emails so please mail me only as your last resort. Instead try to solve your problem by searching the wiki, the bugtracker and the mailinglist archive first (or all of them together). If you don't find a solution for your problem subscribe to the mailinglist and ask your question there or use the forum or join the IRC chat channel.
Companies might be interested in commercial support. Such support is available through the company I work for. Visit the DokuWiki Support page, send a mail to dokuwiki [at] cosmocode [dot] de or just give us a call at +49 30 28096200.
More providers of professional service for DokuWiki are listed at WikiMatrix.