Vladislav Bogdanov wrote:
Working with high-traffic mailboxes with threading turned on is annoying a lot when one needs to find specific not-so-old message hidden somewhere deep in long-ago-started thread (it could be on third or even fifth page).
I was thinking about something like that, but my idea is close to the Thunderbird's views. It means we can add predefined filters (today, last month, etc) to the filter select box (not search). Then would be nice to make this filters user-defined like in Thunderbird. It is some kind of client-side sieve filters but only for viewing, using operands supported by SEARCH/SORT/THREAD command, configurable via a new section in Settings->Preferences. This of course would be a lot of work, more than your quick hack.