Trash folder not showing by default

the Trash folder does not show by default unless I go in and subscribe to it. This would be ok if it were just me, but I am trying to deploy this for feedback purposes sitewide and I cannot explain to 100's of that they need to subscribe to the Trash folder. Also, if the Sent folder is not subscribed to, when you send an email message, you get an error... The mail seems to send however. I supposed it cannot copy it to the Sent IMAP mail store. I haved looked through the code, and I cannot seem to find where certain folders are subscribed to by default. Could someone please point me in the right direction.

Stephen