On 15.8.2012, at 12.30, Timo Sirainen wrote: > On 15.8.2012, at 9.51, CpServiceSPb wrote: > >> How much may implementing of THREAD=ORDEREDSUBJECT to Dovecot 2.1.x or later >> cost ? > > What do you need it for? There is THREAD=REFERENCES that is superior to it in most situations. Well, anyway, here you go: http://hg.dovecot.org/dovecot-2.1/rev/670f467ff5c5