October 2016 - dovecot

Re: NFSv4 and Maildir
by Joseph Tam 01 Oct '16

01 Oct '16

> we have a setup with (CentOS 6) Director+Dovecot, Maildir as storage on > NetApp NFS v3. Every time I try to switch to NFS v4 I found issue with > lock (and others). So for me NFSv4 with Maildir is "unstable" or need a > fine tuning that I don't know. I found the same thing, and turning off write delegation seemed to have solved the problem. I still don't know why, though. Joseph Tam <jtam.home(a)gmail.com>

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Bug: Shared Mailbox - Case Sensitivity
by Leander Schäfer 01 Oct '16

01 Oct '16

Hi, unfortunately I found a bug in Dovecot's ACL handling for shared mailboxes. It turns out Dovecot doesn't enforce lower casing the privileged username to whom the mailbox should be shared to. This results in a invalid configuration. Users get confused, since they passed on a valid email address in their ACL setup. /usr/local/www/default/mail/test(a)mydomain.localdomain/maildir/.Spam/dovecot-acl user=leander(a)mydomain.localdomain eilrwts ^^ works /usr/local/www/default/mail/leander(a)mydomain.localdomain/maildir/dovecot-acl user=test(a)mydomain.localdomain eilrwts ^^ works /usr/local/www/default/mail/test(a)mydomain.localdomain/maildir/.Drafts/dovecot-acl user=Leander(a)MyDomain.LocalDomain eilrwts ^^ Doesn't work Best regards Leander Schäfer

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acl_group not working not working correctly
by Leander Schäfer 01 Oct '16

01 Oct '16

Hi, I'm trying to setup group based ACLs coming from OpenLDAP. My setup doesn't require a POSIX Group match. In the Dovecot configuration file I have this: "user_attrs = [...], mailAclGroups=acl_groups" as well as "acl = vfile:/usr/local/etc/dovecot/global-acls:cache_secs=300". The user has "public" in the LDAP attribute "mailAclGroups". It seems to get everything right. I checked with doveadm - and I see public ist listed as expected: cat /var/log/debug.log [...] Sep 16 23:39:04 WM-01 dovecot: auth: Debug: client passdb out: OK 1 user=leander(a)mydomain.localdomain acl_groups=public [...] cat /usr/local/etc/dovecot/global-acls INBOX owner lrwstipekxa Drafts owner lrwstipeka Sent owner lrwstipeka Spam owner lrwstipeka Trash owner lrwstipeka Public authenticated l Public group-override=public lrwstipekx Public/* group-override=public lrwstipekx doveadm mailbox list -u leander(a)mydomain.localdomain Drafts Sent Trash Spam Shared Public Public/Service Center Shared/test(a)mydomain.localdomain Shared/test(a)mydomain.localdomain/Drafts Shared/test(a)mydomain.localdomain/Sent Shared/test(a)mydomain.localdomain/Trash Shared/test(a)mydomain.localdomain/Spam INBOX But here comes the strange thing: telnet equal to Thunderbird: . LIST "" "*" * LIST (\HasNoChildren \Drafts) "/" Drafts * LIST (\HasNoChildren \Sent) "/" Sent * LIST (\HasNoChildren \Trash) "/" Trash * LIST (\HasNoChildren \Junk) "/" Spam * LIST (\Noselect \HasChildren) "/" Shared * LIST (\HasChildren) "/" Shared/test(a)mydomain.localdomain * LIST (\HasNoChildren) "/" Shared/test(a)mydomain.localdomain/Drafts * LIST (\HasNoChildren) "/" Shared/test(a)mydomain.localdomain/Sent * LIST (\HasNoChildren) "/" Shared/test(a)mydomain.localdomain/Trash * LIST (\HasNoChildren) "/" Shared/test(a)mydomain.localdomain/Spam * LIST (\HasNoChildren) "/" INBOX . OK List completed (0.000 + 0.000 + 0.092 secs). Public and Public/* shoul be listed as well, but it isn't. Any idea why it is behaving like this? Thanks Best regards Leander Schäfer

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