[otrs] Where config the Auto-Answer and Ticket number

Hi two small question for a new user of OTRS I) in OTRS 1.13, where we configure the auto-answer ? (sorry for my english) When i sent a email to my server, the ticket are created (good) but : 1- The user that open the ticket don't receive the number etc ... 2- The Technicien don't receive a information of a new tickets are created .. by cron, i start only PostMasterPOP3.pl for check the email, it's a other script that sent the auto-answer ? II) It is possible that put un ticket number ?: 20040105.0019 or 20040105-0019 (yearmounthday.ANumber at 4 digit) If yes, where ? Thanks for your help