CentOS 6.5 Webmail Server: warning: SASL: Connect to private/auth failed: No such file or directory

Question

I'm trying to run a webmail server on CentOS with Postfix, Docecot and Roundcube. Whenever I try to send mail or send a test email to my server it fails. I can login so looks like Dovecot is okay.

Here is my server log:

Jul  2 14:01:42 phantastyc postfix/smtpd[20154]: warning: SASL: Connect to private/auth failed: No such file or directory
Jul  2 14:01:42 phantastyc postfix/smtpd[20154]: fatal: no SASL authentication mechanisms
Jul  2 14:01:43 phantastyc postfix/master[18459]: warning: process /usr/libexec/postfix/smtpd pid 20154 exit status 1
Jul  2 14:01:43 phantastyc postfix/master[18459]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling

When I send a test email to my server:

Jul  2 14:01:42 phantastyc postfix/smtpd[20154]: connect from mail-ve0-f178.google.com[209.85.128.178]

Then it displays the same error as above.

And when I compose mail with Roundcube, it just hangs at Sending message... and after a while says SMTP Error (-1): Connection to server failed and the logs say the same message.

Here is my postconf -n output:

alias_database = $alias_maps
alias_maps = hash:/etc/postfix/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
html_directory = no
inet_interfaces = all
inet_protocols = ipv4
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
relay_domains = *
sample_directory = /usr/share/doc/postfix-2.6.6/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_sasl_type = dovecot
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $mydomain
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_type = dovecot
unknown_local_recipient_reject_code = 550
virtual_alias_maps = hash:/etc/postfix/vmail_aliases
virtual_gid_maps = static:2222
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = hash:/etc/postfix/vmail_domains
virtual_mailbox_maps = hash:/etc/postfix/vmail_mailbox
virtual_minimum_uid = 2222
virtual_transport = virtual
virtual_uid_maps = static:2222

Here is doveconf -n output:

# 2.0.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-042stab088.4 i686 CentOS release 6.5 (Final) reiserfs
auth_mechanisms = plain login
default_login_user = vmail
disable_plaintext_auth = no
first_valid_gid = 2222
first_valid_uid = 2222
listen = *
mail_access_groups = vmail
mail_location = maildir:/var/vmail/%d/%n
passdb {
  args = scheme=SHA1 /etc/dovecot/passwd
  driver = passwd-file
}
protocols = imap lmtp
service auth {
  unix_listener auth-client {
    group = vmail
    mode = 0660
    user = vmail
  }
  unix_listener auth-master {
    group = vmail
    mode = 0660
    user = vmail
  }
  user = root
}
service imap-login {
  process_min_avail = 1
  user = vmail
}
ssl = no
userdb {
  args = uid=2222 gid=2222 home=/var/vmail/%d/%n allow_all_users=yes
  driver = static
}

And when I do:

[root@phantastyc ~]# ls -l /var/spool/postfix/private/auth
ls: cannot access /var/spool/postfix/private/auth: No such file or directory

Edit 1

It sort of worked, except there's now a new error message:

Jul  3 03:03:14 phantastyc postfix/trivial-rewrite[23348]: fatal: open database /etc/postfix/vmail_domains.db: No such file or directory
Jul  3 03:03:15 phantastyc postfix/master[18459]: warning: process /usr/libexec/postfix/trivial-rewrite pid 23348 exit status 1
Jul  3 03:03:15 phantastyc postfix/master[18459]: warning: /usr/libexec/postfix/trivial-rewrite: bad command startup -- throttling

Also Google (the server where I sent the test email from) returns a delay error saying the connection to the server was dropped and that it'll keep retrying.

Edit 2

After fixing the problem above using postmap, I ran into another problem.

Here's some logging:

Jul  4 21:51:20 phantastyc postfix/smtpd[13016]: connect from mail-vc0-f171.google.com[209.85.220.171]
Jul  4 21:51:21 phantastyc postfix/trivial-rewrite[13019]: warning: do not list domain phantastyc.tk in BOTH mydestination and virtual_mailbox_domains
Jul  4 21:51:21 phantastyc postfix/smtpd[13016]: NOQUEUE: reject: RCPT from mail-vc0-f171.google.com[209.85.220.171]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in local recipient table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<mail-vc0-f171.google.com>
Jul  4 21:51:21 phantastyc postfix/smtpd[13016]: disconnect from mail-vc0-f171.google.com[209.85.220.171]

Not in local table?

Here is /etc/postfix/vmail_domains:

[email protected]     phantastyc.tk/admin
[email protected]       phantastyc.tk/bnguyen

[email protected]         oa2019.tk/admin
[email protected]       oa2019.tk/bnguyen

What else did I screw up?

Edit 3

Since the log said I couldn't have the domain name in both mydestination and virtual_mailbox_domains I removed it from the mydestination field and now outgoing mail is fine. Incoming mail is still a little unsteady.

Jul  4 22:10:41 phantastyc postfix/smtpd[13160]: connect from mail-vc0-f173.google.com[209.85.220.173]
Jul  4 22:10:41 phantastyc postfix/smtpd[13160]: 514F213E0E3A: client=mail-vc0-f173.google.com[209.85.220.173]
Jul  4 22:10:41 phantastyc postfix/cleanup[13164]: 514F213E0E3A: message-id=<[e-mail]>
Jul  4 22:10:41 phantastyc postfix/qmgr[13153]: 514F213E0E3A: from=<[email protected]>, size=1930, nrcpt=1 (queue active)
Jul  4 22:10:41 phantastyc postfix/virtual[13165]: 514F213E0E3A: to=<[email protected]>, relay=virtual, delay=0.4, delays=0.32/0.01/0/0.06, dsn=4.2.0, status=deferred (delivery failed to mailbox /var/vmail/phantastyc.tk/admin: cannot open file: Is a directory)
Jul  4 22:10:41 phantastyc postfix/smtpd[13160]: disconnect from mail-vc0-f173.google.com[209.85.220.173]
Jul  4 22:11:08 phantastyc postfix/smtpd[13160]: connect from localhost.localdomain[127.0.0.1]
Jul  4 22:11:08 phantastyc postfix/smtpd[13160]: 4292A13E0E3B: client=localhost.localdomain[127.0.0.1], sasl_method=LOGIN, [email protected]

This freaks me out:

(delivery failed to mailbox /var/vmail/phantastyc.tk/admin: cannot open file: Is a directory)

What's up with that?

Here is ls /var/vmail/phantastyc.tk/admin:

cur
dovecot.index.log
dovecot.mailbox.log
dovecot.uidlist
dovecot.uidvalidity
dovecot.uidvalidity.53b3965c
new
subscriptions
tmp

Here is /etc/postfix/vmail_domains:

[email protected]     phantastyc.tk/admin
[email protected]       phantastyc.tk/bnguyen

[email protected]         oa2019.tk/admin
[email protected]       oa2019.tk/bnguyen

Edit 4

Sorry I was rushing ahead of myself. I should've done that first. A simple search found that a trailing slash was missing on the mailbox directory. My mail server now works fine.

Solution

Looks like mismatch of dovecot configuration and postfix configuration.

In dovecot configuration (especially in section service auth, you just define two socket auth-client and auth-master. Add one section unix_listener with content

unix_listener /var/spool/postfix/private/auth {
  mode = 0660
  # Assuming the default Postfix user and group
  user = postfix
  group = postfix        
}

See this page for further documentation.

Comments

[Brandon Nguyen]

Thanks for the postmap solution. Except we have more problems. See edits above.

[Brandon Nguyen]

Should I keep editing it or make new threads?

[masegaloeh]

Well I suggest that you post another question. NOTE: Please invest some time to googling the error message in your problem. Your problem has been asked and answered many times in serverfault or in other forums.

[Brandon Nguyen]

Sorry I was rushing ahead of myself. I should've done that first. A simple search found that a trailing slash was missing on the mailbox directory. My mail server now works fine. Thanks for your help and sorry if I was really dumb.