ooo that is nice also. I will look into that. I think it is a good approach. Kind regards to everyone! Xu On Tue, Jun 13, 2017 at 7:31 PM, David Bremner <david@tethera.net> wrote: > Xu Wang <xuwang762@gmail.com> writes: > >> I bump this. Actually more simple than that, how to search for thread >> in which I have participated and Jian has participated? Excluding >> threads in which Dave participated is perhaps more complicated. > > I don't know of an efficient way to do this. You could write a script > something like > > notmuch search --output=threads from:Xu > A > notmuch search --output=threads from:Jian > B > comm -12 A B > > I think the output is sorted, but you might also have to sort A and B >