Am 2015-09-28 um 14:03 schrieb Timo Sirainen:

On 28 Sep 2015, at 14:03, Peter Chiochetti <pch@myzel.net> 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

Indeed, that works, and the result is much easier to read. Thank You a lot for the tip!

PS: Does mail_plugins mail_log mail_log_fiels also support this chaining of decoder? If not, a feature wished for… Gonna try tomorrow or next week ;)

-- peter