October 2016 - dovecot

Re: Bug: Shared Mailbox - Case Sensitivity
by Aki Tuomi 01 Oct '16

01 Oct '16

Can you provide doveconf -n? ---Aki TuomiDovecot oy -------- Original message --------From: Leander Schäfer <info(a)netocean.de> Date: 01/10/2016 03:41 (GMT+02:00) To: Aki Tuomi <aki.tuomi(a)dovecot.fi>, Dovecot Mailing List <dovecot(a)dovecot.org>, Timo Sirainen <tss(a)iki.fi> Subject: Re: Bug: Shared Mailbox - Case Sensitivity Am I missing something, or might this be a bug as it seems to me? Am 16.09.16 um 14:21 schrieb Leander Schäfer: > Hi Aki, > > > Thanks for your advice. Yes, I'm aware of this. Yet lowercasing should > be the default since Dovecot 2.1.x., isn't it? Yet I wouldn't know > where exactly to implement this %L, since the ACLs are set through > IMAP commands through the users mailclient like Thunderbird. So in > other words, the email address to whom the user want to grant ACLs > provided by the user's mailclient, has nothing to do with my auth > backend where e.g. %u => %Lu would apply. PLease correct me if I'm > wrong here. > > > It clearly looks like a bug of the internal processing of the > "dovecot-acl-list" files. It simply lacks on a lowercase enforcement > in the code, like it already seems to do for the "dovecot-acl" file. > > > Best regards > > Leander Schäfer > > > > Am 16.09.16 um 12:53 schrieb Aki Tuomi: >> >> On 16.09.2016 12:54, Leander Schäfer wrote: >>> 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 >> Hi! Did you know you can use %Lu instead of %u to force lowercasing? >> >> Aki

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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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