Is it valid to create a user without an actual mailbox and then make aliases of any defunct accounts to this ghost account? Will it cause the server or qmail any problems for messages to constantly come at it with nowhere to go? We have email accounts that are no longer valid. These accounts receive a good bit of spam and I was hoping to stop all the bouncing back and forth for these now invalid accounts. I'm just unsure if all that junk "dissolves away" or if it somehow bogs things down. I'd also like to know if creating doublebounce settings are recommended and the best step-by-step method for doing it if so. thanks!