[otrs] Ticket is Open again and again

Hi List, I have a trouble: I did close a ticket but it was reopen automaticaly. I did see and the currently "From:" and "To:" fields have the queue email account (queueaccount@mydomain.com), even when the ticket had "From: queueaccount@mydomain.com" and "To: customeraccount@itsdomain.com". Currently, I did close the ticket and the system open again. I did try setting a filter postmaster like: Match Header 1: From ------------ Value: queueaccount@mydomain.com Set Header 1: X-OTRS-Queue: ------ Value: Junk but even so, the system reopen the ticket. Any ideas to solve? Specs: FreeBSD OTRS 2.1.7 Apache 2 MySql 4 Carlos México