Maybe I'm thick but I cannot figure this one out: I really like the self-registration feature. The idea is that our customers should be able to self serve as much as possible. However at the moment anyone can register and I fear that when we go live there will be lots of self-registration attempts by spammers. In the company I work for the customer organizations are well-known (a dozen or so). The users within them are not (several hundreds). What I would like is that only users (customers) who register with e-mail domains that are known to the OTRS system are allowed to self-register on the portal. Example : We would allow john.doe@ikea.com to self-register because IKEA is a customer of ours and thus "@ikea.com" is a well-known e-mail domain. Conversely if joe.hacker@harmful.com tries to register he should be rejected. (IKEA is not really a customer of ours in real world :-)) Having the above functionality would of course require that OTRS would store a list of known e-mail domains for each customer organization. But, but. There may be other ways to prevent misuse of the self-registration feature. Perhaps some functionality that already exist? Any ideas ? Thx. Brian