Some progress was achieved by using symlinks to make the Maildir a subdirectory of
the public namespace location:
mkdir /home/others/sharedmail/public-mails
ln -si /home/others/sharedmail/Maildir/
/home/others/sharedmail/public-mails/.Public
and
namespace {
list = yes
location = maildir:/home/others/sharedmail/public-mails
prefix = Public.
separator = .
subscriptions = no
type = public
}
However, Postfix delivers new mails with mode 600:
# ls -l /home/others/sharedmail/Maildir/cur
-rw--- 1 sharedmail sharedmail 1596 Sep 4 16:25
1472999138.V804I3c0028M764419.pe2:2,
-rw--- 1 sharedmail sharedmail 1596 Sep 4 16:36
1472999809.V804I3c002cM121024.pe2:2,
So I can now subscribe to the Public maildir, but still cannot read the mails...
I had the impression that using dovecot's lmtp delivery could help, but when I set
"mailbox_transport = lmtp:unix:private/dovecot-lmtp" in postfix main.cf, mails are
rejected because my recipient maps / virtual_alias maps are ignored.
Would someone know what I have to do? I could (re-)try configuring dovecot ACLs, but
according to http://wiki2.dovecot.org/SharedMailboxes/Permissions it looks like it
wouldn't help:
"If you use more than one UNIX UID for
your
mail users (e.g. you use system users), you'll need to make sure that all
users
can access the mailboxes on filesystem level. (ACL plugin
won't help you with this.) "
Basically, I have:
- email users are system users
- Postfix holds the email -> user maps (mostly in regexp or pcre format)
How can I have Public or Shared mailboxes?
Original Message
I'm trying to set up a Public mailbox, but when I try to subscribe to it in
Thunderbird, nothing happens: it doesn't appear as a folder, and when I go back to
the Subscribe window, it is unchecked again.
I use postfix local dlivery, which created a Maildir when a mail arrived for this
mailbox: /home/others/sharedmail/Maildir/{cur,new,tmp}
(sharedmail is a system user so that Postfix can deliver the mail; it doesn't have
a login shell or a password)
To make sure it is not a simple filesystem permissions problem, I did "chmod -R
a+rwX Maildir/"
This is my current config ( I tried to keep it short by leaving only what might be
relevant ):
# dovecot -n
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.9
...
mail_location = maildir:~/Maildir
namespace {
list = yes
location = maildir:/home/others/sharedmail/Maildir
prefix = Public.
separator = .
subscriptions = no
type = public
}
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox ...
...
}
prefix =
separator = .
}
passdb {
driver = pam
}
plugin {
sieve = ~/.dovecot.sieve
sieve_dir = ~/sieve
}
protocols = " imap"
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
}
userdb {
driver = passwd
}
Also, I'm not sure about the difference between type=public and type=shared. But
anyway, I tried both with the same result.
