Just as you can organize mailboxes into mail folders, you can organize smart mailboxes into smart mailbox folders.
In a mail window, I had been frustrated by the inability to sort Smart Mailboxes in folders like you can with normal mailboxes, so I had left all my smart mailboxes at the top level of my mailbox folder hierarchy. It turns out that there is a separate command, Mailbox > New Smart Mailbox Folder, which creates a folder that you can use to organize your smart mailboxes. And just like normal mailbox folders, you can nest a smart mailbox folder inside another.
I think the reason I hadn’t seen the New Smart Mailbox Folder command before is that I usually click the buttons at the bottom of a mail window to perform a command instead of looking in the menu bar itself. The New Smart Mailbox Folder command appears only under the Mailbox menu.
UPDATE: Sometimes the New Smart Mailbox Folder command is unavailable. If this happens, you need to select an account under Inbox, and not select Inbox itself. (Selecting Inbox displays messages from all accounts, while selecting an account displays only the messages inside that account.)
Hey, I know you posted this a long time ago, but I just found it via Google and it helped me out. Thanks for the tip!
I think the feature is hidden in the Mail menu because it’s actually pretty underdeveloped. When you group Smart Mailboxes under a Smart Mailbox Folder, clicking on that folder should show you all the emails underneath. Unfortunately it doesn’t, but I have recommended that this be changed via Apple feedback.
What I’ve *always* wondered (Tiger Mail 2.0) is why in the NAME OF GOD can’t I organize Smart mailboxes in the hierarchy the same way I can with any other mailbox? I mean – hell, they are useful, but if I can only put them at the top (even if I can make a hierarchy there) – the ability to find them is reduced.. Yeah, yeah – get Entourage..