[otrs] email addresses and queues

Hi, I have the following setup. All mail to address A@ is going to queue A. All mail for address B@ is going to queue B. If someone sends a mail To: A@, B@ (or even To: A@, Cc: B@) the mail is delivered only to one queue (e.g. queue A). I guess this is normal, since only one ticket should be created. But, the people reading queue B don't even know about the ticket being created. Has someone sorted this out already? Any hints? Anne-Mie