[otrs] 7000 Support-Entries from one Domain-Robot

Hello! Tonight an Domain-Robot creates over 7000 Support Entries in OTRS. Is there any method to delete all Tickets from one E-Mailadress? I have over 80 pages in Queue-View! 2. Isnt there function that one e-mail adress couldn't create so much tickets in 24 hours? Postmaster.pl has this function for auto-reply: ERROR: OTRS-PM3-10 Perl: 5.8.0 OS: linux Time: Wed Oct 8 09:00:01 2003 Message: LoopProtection!!! Send no more emails to ''! Max. count of 40 has been reached! Why not for incoming messages? Thank you for any help, we cant find our normal support tickets between the 7000 robot-tickets! Best regards Gerhard