Is it possible to invite a group of people with a collective address ? if it is, the registering form should not have a pre-filled email field.
Currently not, but we're about to change many little things about the invitation process (esp. this 24h timeout).
What we had in mind was:
The problem I see with collective addresses would be that a forwarded email could possibly allow anyone to join-in... So this may be quite unsecure. But we can add an option to explicitly enable this if necessary.
Thanks for your feedback !