Initialization Failed:

[brian]

Hi dovecotters

I am trying to install dovecot on a mail server I am provisioning for 
myself in AWS.
I am following an ArsTechnica guide, and at some stage in the process 
the author recommends and provides instructions to configure Dovecot 
(http://arstechnica.com/information-technology/2014/03/taking-e-mail-back-part-2-arming-your-server-with-postfix-dovecot/4/) 


So, now I have it installed and configured (I believe the way suggested) 
but when I try to connect via IMAP I am getting an error.

If I try :
root at ip-10-0-0-244:~# telnet mail.myactualdomain.com 143
Trying 127.0.0.1...
Connected to mail.myactualdomain.com.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE 
IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot (Ubuntu) ready.
a1 LOGIN brian at myactualdomain.com plaintextpassword
* BYE Internal error occurred. Refer to server log for more information.
Connection closed by foreign host.
root at ip-10-0-0-244:~#

If I go to /var/log/syslog I can see the following lines:
Oct 31 05:31:06 ip-10-0-0-244 dovecot: imap-login: Login: 
user=<brian at myactualdomain.com>, method=PLAIN, rip=127.0.0.1, 
lip=127.0.0.1, mpid=16934, secured, session=<oCTO2V8jUwB/AAAB>
Oct 31 05:31:06 ip-10-0-0-244 dovecot: imap(brian at myactualdomain.com): 
Error: user brian at myactualdomain.com: Initialization failed: Namespace 
'': Unknown setting: /var/mail/vmail/myactualdomain.com/brian/mail
Oct 31 05:31:06 ip-10-0-0-244 dovecot: imap(brian at myactualdomain.com): 
Error: Invalid user settings. Refer to server log for more information.

root at ip-10-0-0-244:~# dovecot --version
2.2.9

So, I don't know why it's giving me an error about :
Initialization failed: Namespace '': Unknown setting: 
/var/mail/vmail/myactualdomain.com/brian/mail

The location is there, with the permissions with I believe the correct 
permissions.
I'm a bit stuck as to where to even go from here.

Any help would be greatly appreciated.

Kind Regards
Brian



root at ip-10-0-0-244:~# dovecot -n
# 2.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 3.13.0-48-generic x86_64 Ubuntu 14.04.2 LTS
auth_mechanisms = plain login
auth_verbose = yes
mail_home = /var/mail/vmail/%d/%n
mail_location = maildir:~/Maildir:/var/mail/vmail/%d/%n/mail:LAYOUT=fs
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope 
encoded-character vacation subaddress comparator-i;ascii-numeric 
relational regex imap4flags copy include variables body enotify 
environment mailbox date ihave
namespace inbox {
   inbox = yes
   location =
   mailbox Drafts {
     auto = subscribe
     special_use = \Drafts
   }
   mailbox Junk {
     auto = subscribe
     special_use = \Junk
   }
   mailbox Sent {
     auto = subscribe
     special_use = \Sent
   }
   mailbox Trash {
     auto = subscribe
     special_use = \Trash
   }
   prefix =
}
passdb {
   args = username_format=%u scheme=ssha512 /etc/dovecot/passwd.db
   driver = passwd-file
}
plugin {
   sieve = ~/.dovecot.sieve
   sieve_after = /var/mail/vmail/sieve-after
   sieve_before = /var/mail/vmail/sieve-before
   sieve_dir = ~/sieve
}
protocols = imap sieve
service auth {
   unix_listener /var/spool/postfix/private/dovecot-auth {
     group = postfix
     mode = 0660
     user = postfix
   }
}
ssl_cert = </etc/ssl/private/ssl-chain-mail-myactualdomain.pem
ssl_cipher_list = 
ALL:!LOW:!SSLv2:ALL:!aNULL:!ADH:!eNULL:!EXP:RC4+RSA:+HIGH:+MEDIUM
ssl_client_ca_dir = /etc/ssl/certs
ssl_key = </etc/ssl/private/ssl-key-decrypted-mail-myactualdomain.key
userdb {
   args = uid=5000 gid=5000 home=/var/mail/vmail/%d/%n
   driver = static
}
protocol lda {
   deliver_log_format = msgid=%m: %$
   mail_plugins = sieve
   postmaster_address = postmaster at myactualdomain.com
   quota_full_tempfail = yes
   rejection_reason = Your message to <%t> was automatically rejected:%n%r
}
protocol imap {
   imap_client_workarounds = delay-newmail tb-extra-mailbox-sep
   mail_max_userip_connections = 10
}