[Dovecot] Maildir permissions and Solr re-indexing

Michael Welsh Duggan mwd at md5i.com
Mon Jul 29 17:10:00 EEST 2013

I am running a very small dovecot installation with only one user (me).
I use the Solr indexer for indexing.  Due to complicated reasons, I was
forced to remove all the indexes and need to re-index everything.

All the files in my Maildir are owned by md5i:mail (I am md5i), and have
660 permissions.  All directories have the same user:group permissions,
and 770 with the setguid bit set.  (That last may not be necessary, but
I was trying several things to get my use case to work.)

Unfortunately, I can't seem to get re-indexing to work.  When I do
"doveadm fts rescan -A" as root, I get the following error for each of my

doveadm(md5i): Error: fchown(/home/md5i/Maildir/.mail.test/dovecot.index.log.newlock, group=8(mail)) failed: Operation not permitted (egid=1000(md5i), group based on /home/md5i/Maildir/.mail.test - see http://wiki2.dovecot.org/Errors/ChgrpNoPerm)

After this, each directory has a dovecot.index.log with md5i:md5i 600

I've read the mentioned page, and played around with the ideas on it,
but haven't gotten things to work.  Anyone have any clue to ship my way?

Michael Welsh Duggan
(md5i at md5i.com)

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