[rt-users] Looping messages when postmaster at domain does not exist.

[Stan]

For some reason when people email my RT system, and for whatever reason 
the delivery fails (I think its when the sender has a badaddress), and 
RT sends out a:



RT could not load a valid user, and RT's configuration does not allow

for the creation of a new user for this email (postmaster at domain.com)



You might need to grant 'Everyone' the right 'CreateTicket' for the

queue general.





This message is bounced back to their domain, which replies the same.



Short of making people enable postmaster at domain accounts, how can I stop 
RT from looping on these emails?