I am writing a trigger on User object. The scenario is that if some user from a particular domain is invited then as usual this person will receive chatter invite and can register if he is not part of org. I have written a trigger user_before_insert will add an error if the user's email ID is of particular domain and it is working fine.

PS: When the insert user fails during this external chatter user is trying to register Salesforce shows on error page 'User account could not be created' instead of this can i redirect my user to a custom VF page? how?

Thanks in Advance!!

Hi.

One of my client needs to know how an Email Address is validated

by salesforce,because the same validation rule /specification should be done

with another application/system the client uses.

This is to balance the Email validation  specification  in both systems/application.

Thanks

suresh