Hello, I have released Mew version 5.1.52: http://www.mew.org/Beta/mew-5.1.52.tar.gz In this version, you can specify search filter for Hyper Estraier. For more information, see: http://www.mew.org/feature/est.html.en http://www.mew.org/feature/est.html.ja --Kazu