I have created 3 ACL rules with the sysconfig - Core::PostMaster. 1: Module = Kernel::System::PostMaster::Filter::Match StopAfterMatch = Yes Match => Subject = SomeNumber:(\d\d\d\d) Set => OTRS-Valid = yes 2: Module = Kernel::System::PostMaster::Filter::Match StopAfterMatch = Yes Match => X-OTRS-Queue = [a-zA-Z] Set => OTRS-Valid = yes 3: Module = Kernel::System::PostMaster::Filter::Match StopAfterMatch = Yes Match => Subject = . Set => OTRS-Ignore = yes If I try to create a new tickey by e-mail the support mail this will rejected by otrs. This is correct but it will also rejected when I have a ticketnumber in the subject or an OTRS-Queue header in it. Why StopAfterMatch is'nt working? Thx in Advance! Regards Teun