I know this question has been raised a few times but i've not found a working solution yet. I think most people appreciate the value of the out of office reply. Its my understanding that exchange 2007 removes the sender/from address of the oof prior to sending. Our out off office replies are only sending internally. External out of office replies are getting stuck in the queue with the message 450 4.5.0 No recipient succeeded.
I have managed to set up a rule for external oof's so that a preset template message is sent and that works ok. Is there some way to make exchange 2007 keep the from/sender address so that these external oofs have a chance of working as intended.