Tim O'Reilly at O'Reilly Radar - MarkMail Provides Amazing Search Capabilities:

"I love the way MarkMail gives me a bunch of drill-down choices in the UI, and as I choose them, rewrites the command-line in the search box. I'd love to see features like this in my other mail packages. With Mail.app on Mac OS X, for example, it's impossible to do a complex search. You can search for a text string in the from field, the subject line, or the entire message, but what if you want to say "I want a message on x, from Joe, to Mary, sent between April and June of 2006." Even on Gmail, where I can do this kind of search with Search Options, I have to go to another whole screen, out of the search flow, to do it. You can construct that kind of a search in MarkMail just by navigating around. Yumm. How long before regular mail vendors start doing this kind of thing? This is a really sweet search interface."