Re: Dovecot cannot find mailboxes

Steffen Kaiser Sun, 24 Jul 2016 23:30:59 -0700

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On Sun, 24 Jul 2016, C. Andrews Lavarre wrote:

I have solved gaining access from a client (Evolution) via IMAP to the
server: I can refresh, add folders, and delete folders. But I am still
confounded, as IMAP does not see any mailboxes. Neither we from the
command line (telnet, openssl, login, select) nor the system can find
the mailbox, despite following FindMailLocation:

        telnet, openssl, login, then
   b select inbox
   * 0 EXISTS
   * 0 RECENT

   and postfix fails with

   2016-07-23T21:22:37.312039-04:00 lavarre postfix/error[17088]: A8DA2C1BB2: 
to=<a...@privustech.com>, orig_to=<andy>, relay

But the mailboxes do exist in /var/mail/vhosts/privustech.com/andy and
we point to them in /etc/dovecot/users.


Check:
 doveadm user -u andy

then enable logging and see if Dovecot uses the desired mail location.


doveconf -n is attached.

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Two issues are:
1. file permissions and ownership
2. virtual versus system users

1. It appears that having the correct ownership and permissions on
various files is critical (of course), but those parameters must also
be included in the interior of the /etc/dovecot/user. So if you change
permissions you also must change that file.

For example, you said:

   i also noticed your certificate chain is broken.
http://wiki2.dovecot.org/testinstallation

I worked through this link, thank you. Changing permissions for the
directories /var/mail/* to

   root:mail                        ($UID:$GID =     1000:12)

and then changing /etc/dovecot/users correspondingly to

   u...@privustech.com    :{plain}actualpassword:    1000:12    
::/var/mail/vhosts/privustech.com/user

now allows a normal login. and we can create a new folder (e.g., work)
and delete it. However, this is at variance with
        http://wiki2.dovecot.org/HowTo/SimpleVirtualInstall

which says to set the ownership to vmail:vmail  ($UID:$GID = 100:
5000). Doing so breaks dovecot.

2. The various links suggest that having virtual users is preferable to
setting system users. The former do not require directories under /homebut they 
do require a directory in the mail system, which I have provided under 
/var/mail/vhosts. It also turns out that for virtual users you must include the 
domain (a...@privustech.com). Making that change allowed the success reported 
above. But despite that, we still cannot find the mailboxes on login.


Any thoughts on how to have IMAP find the mailboxes (beyond
FindMailLocation, which doesn't seem to work for me) would be most
appreciated.

Kind regards, Andy

- --Steffen Kaiser

Re: Dovecot cannot find mailboxes

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