Try adding patch class to "lib" directory, á la http://www.redmine.org/projects/redmine/wiki/Plugin_Internals#Wrapping-an-existing-method
Try adding patch class to "lib" directory, á la http://www.redmine.org/projects/redmine/wiki/Plugin_Internals#Wrapping-an-existing-method

sdwolf/redmine_mailclean_regexp,ahills/redmine_mailclean_regexp