Changed attachment preference keys according to models/channel/email_parser.rb.
Changed attachment preference keys according to models/channel/email_parser.rb.

zammad/zammad,zammad/zammad,monotek/zammad,monotek/zammad,zammad/zammad,monotek/zammad,monotek/zammad,zammad/zammad,monotek/zammad,zammad/zammad,zammad/zammad,monotek/zammad