On 28 Sep 2015, at 14:03, Peter Chiochetti <[email protected]> wrote: > > The manual at http://wiki2.dovecot.org/Tools/Doveadm/Deduplicate > tells how to estimate what will be expunged: > >> doveadm -f table fetch -u jane 'guid uid' mailbox a_Box | sort > > I wanted to learn the subjects: > >> doveadm -f table fetch -u jane 'guid hdr.Subject' mailbox a_Box > > In the output, long lines will be broken up, continuation lines starting with > a blank (mostly), disabling the sort > >> doveadm -f table fetch -u jane 'guid hdr.Subject' mailbox a_Box \ >> | sed -e :a -e '$!N;s/\n\s//;ta' -e 'P;D' | sort --stable > > Some (gnu) sed foo joins them back together, the sort works again :)
I think this would work too: doveadm -f table fetch -u jane 'guid hdr.Subject.utf8' mailbox a_Box | sort
