Hello,

I am trying to switch from LDA to LMTP on a Postfix/Dovecot setup, but something is going wrong.

I have followed the directions at: https://wiki.dovecot.org/HowTo/PostfixDovecotLMTP

Here is a session from dovecot.log:

Aug 4 12:19:42 vmail2 dovecot: lmtp(3152): Connect from local Aug 4 12:19:42 vmail2 dovecot: auth: ldap(imaptester@noa.gr): unknown user Aug 4 12:19:42 vmail2 dovecot: lmtp(3152): Disconnect from local: Successful quit Aug 4 12:19:42 vmail2 dovecot: lmtp(3152): Connect from local Aug 4 12:19:42 vmail2 dovecot: auth: ldap(nmilas@noa.gr): unknown user Aug 4 12:19:42 vmail2 dovecot: lmtp(3152): Disconnect from local: Successful quit Aug 4 12:19:42 vmail2 dovecot: imap(nmilas): save: box=Sent, uid=31, msgid=<c84ae059-854d-12bc-6aa2-9099cc2977b2@noa.gr>, size=445, vsize=459, from=Nikolaos Milas <nmilas@noa.gr>, subject=Test (12) - vmail2, flags=(\Seen)

What is going wrong?

It seems authentication is not working correctly with this setup. If understand right, dovecot is querying ldap with the whole mail address and not with the local part only (which is the username), as I would expect.

What is the suggested course of action?

With LDA it was working fine; here is a sample log entry:

Aug 4 12:02:51 vmail2 dovecot: lda(imaptester): sieve: msgid=<768b056c-1d12-c9bd-0864-c3fc6a6dbeda@noa.gr>: stored mail into mailbox 'INBOX' Aug 4 12:02:51 vmail2 dovecot: imap(nmilas): save: box=Sent, uid=30, msgid=<768b056c-1d12-c9bd-0864-c3fc6a6dbeda@noa.gr>, size=445, vsize=459, from=Nikolaos Milas <nmilas@noa.gr>, subject=Test (11) - vmail2, flags=(\Seen) Aug 4 12:02:51 vmail2 dovecot: imap(nmilas): Connection closed (noop finished 0.372 secs ago) in=628 out=2145

Please help me to figure out how things should be.

The config file follows:

----------------------------- CONFIG START --------------------------------

protocols = imap pop3 sieve lmtp

login_greeting = NOA POP/IMAP Srv XAPITI XPICTOY

mail_location = maildir:~/Maildir/ mail_gid = 500 mail_uid = 500

auth_mechanisms = plain login auth_username_format = %Lu

auth_verbose = yes auth_debug = no mail_debug = no

disable_plaintext_auth = no

mail_plugins = quota mail_log notify

protocol imap {

imap_client_workarounds = "delay-newmail" mail_plugins = quota imap_quota mail_log notify mail_max_userip_connections = 400

}

protocol pop3 { mail_max_userip_connections = 3 mail_plugins = quota notify pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_uidl_format = %08Xu%08Xv }

protocol lda { auth_socket_path = /var/run/dovecot/auth-master info_log_path = log_path = mail_plugins = quota notify sieve postmaster_address = sysadmin@noa.gr sendmail_path = /usr/lib/sendmail }

protocol lmtp { auth_socket_path = /var/run/dovecot/auth-master postmaster_address = sysadmin@noa.gr mail_plugins = quota notify sieve sendmail_path = /usr/lib/sendmail }

protocol sieve { managesieve_max_line_length = 65536 mail_max_userip_connections = 10 managesieve_logout_format = bytes=%i/%o managesieve_max_compile_errors = 10 }

userdb { args = /etc/dovecot/dovecot-usrdb-ldap.conf driver = ldap }

passdb { args = /etc/dovecot/dovecot-passdb-ldap.conf driver = ldap }

plugin { mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change save mailbox_create mail_log_fields = uid box msgid size flags vsize from subject }

plugin { quota = maildir:User quota quota_rule = *:storage=5G quota_rule2 = Trash:storage=+3%% quota_warning = storage=75%% quota-warning 75 %u quota_warning2 = storage=90%% quota-warning 90 %u }

plugin { sieve = file:~/sieve;active=~/.dovecot.sieve sieve_max_script_size = 0 sieve_max_actions = 0 sieve_max_redirects = 1 }

service quota-warning { executable = script /opt/mail1.sh user = vmail unix_listener quota-warning { user = vmail } }

service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-master { group = vmail mode = 0660 user = vmail } user = root }

service imap-login { service_count = 1 vsz_limit = 64 M process_limit = 500 process_min_avail = 2 }

service pop3-login { service_count = 1 vsz_limit = 64 M }

service managesieve-login { inet_listener sieve { port = 4190 }

service_count = 1 process_min_avail = 0 vsz_limit = 64M }

service managesieve { process_limit = 1024 }

service imap { executable = imap postlogin process_limit = 2048 }

service pop3 { executable = pop3 postlogin }

service postlogin { executable = script-login -d rawlog unix_listener postlogin { } }

service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } }

ssl_ca = </etc/pki/tls/certs/DigiCertCA.crt ssl_cert = </etc/pki/tls/certs/star_noa_gr-1243437.crt ssl_key = </etc/pki/tls/private/star_noa_gr-1243437.key

ssl_protocols = !SSLv2 !SSLv3

syslog_facility = local1

----------------------------- CONFIG END --------------------------------

FILE: /etc/dovecot/dovecot-usrdb-ldap.conf

hosts = localhost tls = no base = ou=people, dc=noa, dc=gr scope = onelevel ldap_version = 3 dn = uid=auth,ou=Sys,dc=noa,dc=gr dnpass = secret auth_bind = yes user_filter = (uid=%u) pass_filter = (uid=%u) pass_attrs = uid=user,userPassword=password auth_bind_userdn = uid=%u,ou=people,dc=noa,dc=gr user_attrs = roomNumber=quota_rule=*:bytes=%$,uid=home=/home/vmail/%u iterate_filter = (objectClass=*)

Thanks in advance, Nick