On Mon, Aug 26, 2013 at 02:50:54PM +0200, Pierre-Philipp Braun wrote:
I would like to use Dovecot not only for virtual mboxes, but also for local users. In other words, I would like to use different "mail_location"s depending on "passdb" "passwd-file" versus "passwd".
I believe that the default mail_location would be overridden by userdb, not passdb.
I need that as the smtp daemon I am using (david parsons' postoffice smtp server) serves both but is only able to process messages through procmail on local users. Here are the two mail_locations I would like to use:
mail_location: mbox:~/mail/:INBOX=/var/mail/%u mail_location: mbox:/var/spool/virtual/%d/%n.imap:INBOX=/var/spool/virtual/%d/%n
This exercise becomes trivial when you follow the advice of the Dovecot wiki and give your virtual users a $HOME. (Well, to be simple, you'd also have to have INBOX in $HOME. An alternative is to specify INBOX for virtual users in your virtual userdb.)
depending on those passdb stanzas, respectively:
passdb passwd-file { args = username_format=%n /etc/virtual/%d/passwd }
passdb passwd { }
Any help would be appreciated.
Here's my Dovecot version and current working configuration for virtual users only:
# dovecot -n dovecot -n # 1.2.17: /usr/local/etc/dovecot.conf
Very old! Consider an upgrade to 2.2.
# OS: FreeBSD 8.3-RELEASE amd64 ufs protocols: imap ssl: no disable_plaintext_auth: no
Hmmm, plaintext AUTH without TLS/SSL could be dangerous. If a spammer can get in a position to sniff those credentials, you could be inundated with spam to relay.
login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login first_valid_uid: 6 first_valid_gid: 6 mail_location: mbox:/var/spool/virtual/%d/%n.imap:INBOX=/var/spool/virtual/%d/%n imap_client_workarounds: tb-extra-mailbox-sep auth default: user: mail passdb: driver: passwd-file args: username_format=%n /etc/virtual/%d/passwd userdb: driver: static args: uid=6 gid=6
I find that first_valid_uid and first_valid_gid don't look pretty but it seems mandatory for the standard 'mail' user and group ownerships to work on the virtual mbox files and folders. I created the user while the group already existed. If you have any advices on that too, I would be pleased.
There is no "standard" UID/GID for virtual mailboxes. In fact there is no need to have them all share the same UID/GID. But on a shared UID/GID virtual system, typically you should set a higher UID/GID such that you exclude all the system accounts (<100 or <500 or maybe <1000 depending on OS. If your OS starts human user accounts at UID 1000, UID 999 would be a good choice for virtual mailbox owner, with that as first_valid_uid also.)
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