This is all there is:
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: shared: root=/var/run/dovecot, index=, indexpvt=, control=, inbox=, alt=
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: acl: initializing backend with data: vfile
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: acl: acl username = spoonm@spoonm.org
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: acl: owner = 0
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: acl vfile: Global ACLs disabled
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota root: name=user backend=dict args=:proxy::quotadict
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota rule: root=user mailbox=* bytes=1073741824 messages=0
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota warning: bytes=1073741824 (100%) messages=0 reverse=no command=quota-warning 100 raw mail user
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota warning: bytes=1020054732 (95%) messages=0 reverse=no command=quota-warning 95 raw mail user
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota warning: bytes=966367641 (90%) messages=0 reverse=no command=quota-warning 90 raw mail user
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota warning: bytes=912680550 (85%) messages=0 reverse=no command=quota-warning 85 raw mail user
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Quota grace: root=user bytes=107374182 (10%)
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: dict quota: user=raw mail user, uri=proxy::quotadict, noenforcing=0
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: none: root=, index=, indexpvt=, control=, inbox=, alt=
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: Destination address: spoonm@spoonm.org (source: user@hostname)
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: sieve: Pigeonhole version 0.4.2 initializing
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: sieve: executed before user's personal Sieve script(1): /var/vmail/sieve/dovecot.sieve
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: sieve: using the following location for user's Sieve script: /var/vmail/vmail1/spoonm.org/s/p/o/spoonm-2017.03.31.11.21.17//sieve/dovecot.sieve;name=main script
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: sieve: opening script 1 of 2 from /var/vmail/sieve/dovecot.sieve
May 30 00:28:08 chiba dovecot: lda(spoonm@spoonm.org): Debug: sieve: loading script /var/vmail/sieve/dovecot.sieve
May 30 00:29:03 chiba dovecot: imap: Debug: Loading modules from directory: /usr/lib/dovecot/modules
May 30 00:29:03 chiba dovecot: imap: Debug: Module loaded: /usr/lib/dovecot/modules/lib01_acl_plugin.so
May 30 00:29:03 chiba dovecot: imap: Debug: Module loaded: /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so
And /var/log/dovecot-sieve.log only shows this:
May 29 23:11:29 chiba dovecot: managesieve(spoonm@spoonm.org): Disconnected: Logged out bytes=63/637
May 29 23:11:31 chiba dovecot: managesieve-login: Login: user=<spoonm@spoonm.org>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=22760, TLS, session=<6bW3zrFQtwB/AAAB>
May 29 23:11:31 chiba dovecot: managesieve(spoonm@spoonm.org): Disconnected: Logged out bytes=63/637
May 29 23:12:36 chiba dovecot: managesieve-login: Login: user=<spoonm@spoonm.org>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=22777, TLS, session=<b6Cg0rFQvQB/AAAB>
May 29 23:12:36 chiba dovecot: managesieve(spoonm@spoonm.org): Disconnected: Logged out bytes=210/664