Hi,
First, my version:
[root@centos1 conf.d]# dovecot --version
2.2.15
[root@centos1 conf.d]#
I have already configured dovecot that way (on one single VM, so everythinh is
stored on the same machine)
- A post fix server sending out to LMTP
- LMTP is the dovecot LMTP server, configured with "lmtp-proxy= no",
- LMTP checks the users receiving messages by using Linux passwd file
"userdb" section in auth-passwdfile.conf.ext,
- IMAP LOGINS are authenticated using DIGEST-MD5 also configured in
auth-passwdfile.conf.ext :
-
# Authentication for passwd-file users. Included from 10-auth.conf.
#
# passwd-like file with specified location.
# <doc/wiki/AuthDatabase.PasswdFile.txt>
passdb {
driver = passwd-file
args = scheme=DIGEST-MD5 username_format=%n /etc/dovecot/users.DIGEST-MD5
#args = scheme=CRAM-MD5 username_format=%n /etc/dovecot/users.CRAM-MD5
}
userdb {
driver = passwd
# Default fields that can be overridden by passwd-file
#default_fields = quota_rule=*:storage=1G
default_fields = uid=root gid=root home=/home/%n
# Override fields from passwd-file
#override_fields = home=/home/virtual/%u
}
This works fine, I can send messages through SMTP, and read them using IMAP
access.
But now, I woukd like to have amore structured architecture with :
- A LMTP server configured as PROXY : has to identify the user, and
proxy the request to the backen LMTP server (where its mailbox will stand)
- On backend, I also have to start another LMTP serevr, but not
configured in proxy mode of course,
- Same for IMAP : IMAP proxy first checking LOGIN credentials, and
then forwarding to IMAP server running on backend.
As a first step, I would like to continue using my files to authenticate uses
(so passwd file , and users.DIGEST-MD5), but final goal will be using a MySQL
DB.
So my main question are :
1) I just made a test and changed "lmtp_proxy" to "yes" in my
20_lmtp.cong file, but, strangely, this did not cah nge anything ! The LMTP
process still receives mails and stores them on the local host ,
2) Are there any documentation describing this process in details ? I only
found some pieces on wiki pages, but not enough unfortunately ...
3) Are there some configuratiion files ready to use for my configuration.
Thanks in advance.
Cordialement.
Guenhaël.
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