dovecot - Mar 2011 - Dovecot, Postfix and Dovecot LDA (LMTP) delivery

Hi list,

I am running a Debian Lenny machine with Postfix 2.5.5 and Dovecot 2.0.8. Up 
until now I ran Postfix with the Procmail delivery agent succesfully. The 
machine has only local users; I am not using virtual mailboxes. Due to obvious 
reasons I want to switch to Dovecot LDA delivery, through LMTP.

I spend quite some time finding 'the' configuration for both Postfix and
Dovecot, but without success. Find my current configuration below. Postfix 
receives the e-mail, but delivery through LMTP fails, resulting in Postfix 
sending an NDR.

I just cannot figure out what's wrong and I am not sure whether it's a
Postfix
or Dovecot problem either. Some log output from Postfix:

Mar  5 13:25:15 hostname postfix/smtpd[12442]: connect from 
otherhost.domain.tld[aa.bb.cc.dd]
Mar  5 13:25:16 hostname postfix/smtpd[12442]: CC47979071: 
client=otherhost.domain.tld[aa.bb.cc.dd]
Mar  5 13:25:16 hostname postfix/cleanup[12447]: CC47979071: 
message-id=<Pine.GSO.4.64.1103051324570.5319 at otherhost.domain.tld>
Mar  5 13:25:16 hostname postfix/qmgr[12372]: CC47979071: 
from=<remy at otherhost.domain.tld>, size=1037, nrcpt=1 (queue active)
Mar  5 13:25:16 hostname postfix/smtpd[12442]: disconnect from 
otherhost.domain.tld[aa.bb.cc.dd]
Mar  5 13:25:16 hostname postfix/lmtp[12448]: CC47979071: 
to=<remy at hostname.domain.tld>, 
relay=hostname.domain.tld[private/dovecot-lmtp], delay=1.2, 
delays=1.2/0.01/0.01/0.05, dsn=5.1.1, status=bounced (host 
hostname.domain.tld[private/dovecot-lmtp] said: 550 5.1.1 
<remy at hostname.domain.tld> User doesn't exist: remy at
hostname.domain.tld (in
reply to RCPT TO command))


The only lines that Dovecot logs are:

Mar 05 13:25:16 lmtp(12449): Info: Connect from local
Mar 05 13:25:16 lmtp(12449): Info: Disconnect from local: Client quit


Although LMTP should log to /tmp/dovecot-lmtp.log, the file remains empty.

Anyone amongst you who is running the same kind of setup and can help?

Thanks,
Remy


Postfix config (postfix -n output)

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
default_transport = smtp
inet_interfaces = all
local_transport = lmtp:unix:private/dovecot-lmtp
mailbox_command mailbox_size_limit = 0
message_size_limit = 31457280
mydestination = hostname.domain.tld, localhost.domain.tld, localhost
myhostname = hostname.domain.tld
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relay_transport = error
relayhost smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_client_restrictions = check_client_access hash:/etc/postfix/access, 
permit_sasl_authenticated, reject_rbl_client zen.spamhaus.org, 
reject_rbl_client dnsbl.sorbs.net,reject_unauth_pipelining
smtpd_helo_required = yes
smtpd_helo_restrictions = 
reject_invalid_helo_hostname,reject_non_fqdn_helo_hostname,reject_unknown_helo_hostname
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, 
reject_non_fqdn_recipient, reject_unauth_destination, 
reject_unknown_recipient_domain
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/access, 
reject_non_fqdn_sender, reject_unknown_sender_domain
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes


Dovecot config (dovecot -n output)

# 2.0.8: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.26-2-amd64 x86_64 Debian 5.0.8
auth_master_user_separator = *
listen = *
log_path = /var/log/dovecot.log
mail_location = maildir:~/.maildir
maildir_stat_dirs = yes
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
namespace {
   hidden = no
   inbox = yes
   list = yes
   location    prefix    separator = /
   subscriptions = yes
   type = private
}
passdb {
   driver = pam
}
plugin {
   sieve = ~/.dovecot.sieve
   sieve_dir = ~/sieve
}
protocols = imap lmtp
service auth {
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0660
     user = postfix
   }
}
service lmtp {
   unix_listener /var/spool/postfix/private/dovecot-lmtp {
     group = postfix
     mode = 0660
     user = postfix
   }
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
   driver = passwd
}
verbose_proctitle = yes
protocol lmtp {
   info_log_path = /tmp/dovecot-lmtp-info.log
   log_path = /tmp/dovecot-lmtp.log
}
protocol imap {
   mail_plugins }

> I am running a Debian Lenny machine with Postfix 2.5.5 and Dovecot 2.0.8.
Up
> until now I ran Postfix with the Procmail delivery agent succesfully. The 
> machine has only local users; I am not using virtual mailboxes. Due to 
> obvious reasons I want to switch to Dovecot LDA delivery, through LMTP.
>
> I spend quite some time finding 'the' configuration for both
Postfix and
> Dovecot, but without success. Find my current configuration below. Postfix 
> receives the e-mail, but delivery through LMTP fails, resulting in Postfix 
> sending an NDR.
>
> I just cannot figure out what's wrong and I am not sure whether
it's a
> Postfix or Dovecot problem either. Some log output from Postfix:
I finally figured out what's wrong. It appears that Dovecot in fact is 
checking the existance of user 'remy at hostname.domain.tld' in one of
the
configured user databases. Obviously, local users/usernames do not have the 
local domain added.

Adding

     userdb {
         driver = passwd-file
         args = username_format=%n /etc/passwd
     }

to the 'protocol lmtp { }' block solves the issue. The only thing is
that
Dovecot now logs this to it's logs:

Mar 06 15:04:57 auth: Error: passwd-file /etc/passwd: User root has invalid 
UID '0'

Can't hurt, but is polutes the logs. Is there a way to configure Dovecot not
to log these messages?

Thanks,
Remy