Reader Alexis Alvarez-Suzuki is having some difficulty taking out Mail’s Trash. As in:
I recently re-installed all my software, including OS X. Everything is working fine, but for some reason I no longer have a Trash folder in my Mail application. What did/do I do?
You need to configure one of your accounts to use Trash. To do so, choose Mail -> Preferences, click the Accounts tab, and select an account. In that account click the Mailbox Behaviors tab. In that tab enable the Move Deleted Messages to the Trash Mailbox option. Close the Preferences window and you’ll be asked to save your settings.
The Trash mailbox should now appear in Mail’s Mailboxes pane.