Does IMAP search not give you most of this functionality? I wrote a little mh-like cli for IMAP awhile back (https://github.com/pjz/mhi) that lets me search just fine, though it's admittedly single-folder-at-a-time search. I did make it composable though (eg. `pick` returns a valid message-list`, so I can `scan $(pick from somesender)` or `rmm $(pick from knownspammer)`
I use thunderbird for most of my email reading, and MHI for searching and scripting. I set up a cron job on an always-up machine that does periodic auto-refiling for me; it's not quite 'on receipt' actions, but it's still handy.
I use thunderbird for most of my email reading, and MHI for searching and scripting. I set up a cron job on an always-up machine that does periodic auto-refiling for me; it's not quite 'on receipt' actions, but it's still handy.