I have rules that sort some mails (e.g. Forums) into a folder on my Mac. The problem: I wanted to set up a smart folder that shows all Mails in Forums that have either MacOSXhints or Macnn in their contents.

So in 10.5's Mail, I set up a Smart folder with these rules:

• Message ... is in Mailbox ... Forums
• Entire Message ... Contains ... MacOSXhints OR Macnn

Now this may sound obvious to some, but for me it was great to see that you can create more complex rules for smart folders. I guess it's related to the new Spotlight features in 10.5 that allows the use of AND and OR expressions.

[robg adds: In 10.4, you had to create three smart mailboxes to pull off something like this; the fact that Mail uses the new Spotlight engine now makes it much simpler.]