[jstummbillig]

I too need to find specific old email. For that, I type what comes to mind into the gmail search box.

To each their own.

[jsjohnst]

So gmail search box allows you to find an email based on email header data? ;)

Sure, gmail search works "ok" when you are searching based on a word in the email or the sender/recipient email. Things more advanced than that it really falls short.