When creating a new customer account, I record the customer domain name.  However, if an email is received from an address on the customer domain, but where the address is not listed against an existing 'requester', the email is discarded.

We have to discard email where the addresses are not recovnised because there is too much spam to create tickets from all incoming email.

But why , when the customer's domain is recorded - are tickets not still created for email coming from customer specific domains ?