I’m trying a super basic config based upon
https://wiki.dovecot.org/HowTo/PostfixDovecotLMTP but before I work on shipping
mail through Postfix to DoveCot, I wanted to make sure IMAP is working first,
but I can’t even get a basic login to so I thought I’d see if the gurus on the
list might be able to point out I’m doing wrong. The documentation is pretty
good, but there were some gaps I had to guess at and I’m presuming that’s where
I went wrong. I’ve turned SELinux to permissive mode, for now.
Here’s the doveconf -n:
# 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
# OS: Linux 3.10.0-1062.12.1.el7.x86_64 x86_64 CentOS Linux release 7.7.1908
(Core)
# Hostname: imap
first_valid_uid = 1000
listen = 192.168.1.207
mail_gid = vmail
mail_home = /var/vmail/%d/%n
mail_location = sdbox:~/mail
mail_uid = vmail
mbox_write_locks = fcntl
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix =
separator = /
}
passdb {
args = scheme=PLAIN username_format=%u /etc/dovecot/users
driver = passwd-file
}
protocols = imap lmtp
service lmtp {
group = vmail
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
user = vmail
}
ssl = no
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_key = # hidden, use -P to show it
userdb {
args = username_format=%u /etc/dovecot/users
driver = passwd-file
}
I wasn’t sure how to set rights on the users file:
[sawozny@imap var]$ cat /etc/dovecot/users
t...@test.com:{plain}test
[sawozny@imap var]$ ls -la /etc/dovecot/users
-rw-r--r--. 1 root root 26 Jun 3 23:31 /etc/dovecot/users
Also, didn’t know what rights to set on the /var/vmail directoy so I did this:
drwxrwx---. 3 vmail vmail 4096 Jun 3 20:52 vmail
This directory is also empty except for the lost+fond directory that comes with
a disk mount point. My understanding is that the mail home and maildir will
manifest automagically on first login, but if I need to prime the pump, please
let me know what I need to do.
For my test, I did:
[sawozny@imap var]$ telnet 192.168.1.207 143
Trying 192.168.1.207...
Connected to 192.168.1.207.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
AUTH=PLAIN] Dovecot ready.
01 LOGIN t...@test.com test
01 NO [UNAVAILABLE] Internal error occurred. Refer to server log for more
information.
Connection closed by foreign host.
And the results in the /var/log/maillog file are:
Jun 3 23:35:34 imap dovecot: auth: Error: passwd-file /etc/dovecot/users: User
t...@test.com is missing userdb info
Jun 3 23:35:44 imap dovecot: auth: Error:
passwd-file(t...@test.com,192.168.1.207,<DBqafDan7ODAqAHP>): user not found
from userdb
Jun 3 23:35:44 imap dovecot: imap: Error: Authenticated user not found from
userdb, auth lookup id=843055105 (auth connected 0 msecs ago, handshake 0 msecs
ago, request took 0 msecs, client-pid=12047 client-id=1)
Jun 3 23:35:44 imap dovecot: imap-login: Internal login failure (pid=12047
id=1) (internal failure, 1 successful auths): user=<t...@test.com>,
method=PLAIN, rip=192.168.1.207, lip=192.168.1.207, mpid=12049, secured,
session=<DBqafDan7ODAqAHP>
I’m not sure where I’ve gone wrong. From my understanding of the documentation,
all I need in the userdb is name and password. UID, GID and HOME are also
indicated as required, but I set them at the system level, so why is the system
telling me the user was not found? This definitely isn’t my first rodeo with
Linux, but I know almost nothing about messaging so in that regard I’m a
totally n00b and would really appreciate some guidance.
Thanks,
Scott
