You can use the custom markup in your local/config.php:
Markup( 'html', 'fulltext', '/\\(:html:\\)(.*?)\\(:htmlend:\\)/mesi', "Keep(str_replace(array('<', '>', '&'), array('<', '>', '&'), PSS('$1')))" );
This markup won't parse the text within
Example in your wiki page:
- Luigi -> mailto:kirpi [snail] kirpi [period] it humbly reported from the Mailing Lists.
- Torsten is the main contributor.