Does anyone know any Help Desk Software which allow you to create user groups / to mark/categorize specific users in some way / and to to ban specific users/e-mails (not user groups) for a specific period of time?
Kayako? OTRS? simpledesk?...
Kayako looks to be very functional but not sure if it has this option. zendesk is also very functional but a SaaS service not a downloadable software. Since the functions that I am saying are very common in forum software, maybe simpledesk could do it since it is based in SMF.