Please check that you are not overwriting mail plugins for lmtp. Or post your doveconf -n.
Aki > On June 10, 2017 at 11:10 AM Peter West <li...@pbw.id.au> wrote: > > > Not sure what you mean. I’m using lmtp to send messages to Dovecot from > Postfix. > > > On 10 Jun 2017, at 6:08 pm, Aki Tuomi <aki.tu...@dovecot.fi> wrote: > > > > What's your LDA? > > > > Aki > > > >> On June 10, 2017 at 11:01 AM Peter West <li...@pbw.id.au> wrote: > >> > >> > >> Thanks for that Aki. > >> > >> Follow-up question. I tried to initiate compression by adding > >> > >> mail_plugins = $mail_plugins zlib > >> > >> plugin { > >> zlib_save_level = 6 > >> zlib_save = xz > >> } > >> > >> > >> to dovecot.conf. I restarted dovecot and sent one message to the server, > >> and one message from the server. Neither was compressed. I changed the > >> save type to > >> > >> zlib_save = bz2 > >> > >> and repeated. This time the message received (in > >> /var/vmail/<host>/<username>/cur) was not compressed, but the message in > >> /var/vmail/<host>/<username>/.Sent/cur was bzip2 compressed. > >> > >> Why is the received mail not being compressed? Is this the point of the > >> discussion about compressing old mails? > >> > >> > >>> On 10 Jun 2017, at 4:43 pm, Aki Tuomi <aki.tu...@dovecot.fi> wrote: > >>> > >>> > >>>> On June 10, 2017 at 5:58 AM Peter West <li...@pbw.id.au> wrote: > >>>> > >>>> > >>>> Concerning Maildir, the wiki page on compression has this: > >>>> > >>>> All mails must have ,S=<size> in their filename where <size> contains > >>>> the original uncompressed mail size, otherwise there will be problems > >>>> with quota calculation as well as other potential random failures. Note > >>>> that if the filename doesn’t contain the ,S=<size> before compression, > >>>> adding it afterwards changes the base filename and thus the message UID. > >>>> The safest thing to do is simply to not compress such files. > >>>> > >>>> Further down on the same page is this: > >>>> > >>>> If the file does exist, rename() (mv) the compressed file over the > >>>> original file. > >>>> • Dovecot can now read the file, but to avoid compressing it again on > >>>> the next run, you'll probably want to rename it again to include e.g. a > >>>> "Z" flag in the file name to mark that it was compressed (e.g. > >>>> 1223212411.M907959P17184.host,S=3271:2,SZ). > >>>> > >>>> These comments seem to contradict each. Or is there a difference between > >>>> adding the size specifier to the filename and adding a Z flag to the end > >>>> of the file name? > >>>> > >>>> -- > >>>> Peter West > >>>> p...@pbw.id.au > >>>> And the great throng heard him gladly. > >>>> > >>> > >>> Keyword is 'base filename'. From the wiki, "The standard filename > >>> definition is: "<base filename>:2,<flags>".". Z is a flag. > >>> > >>> Aki > >> >