LMTP error, mysterious

Andras Kemeny pdx at pdx.hu
Thu Aug 2 01:59:20 EEST 2018 

ah well, but i'm not using sql at all.

here's doveconf -n:

# 2.2.27 (c0f36b0): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.16 (fed8554)
# OS: Linux 4.9.0-4-amd64 x86_64 Debian 9.4
auth_cache_negative_ttl = 0
auth_mechanisms = plain login
hostname = rhyno.tech
mail_debug = yes
mail_location = maildir:~/mail
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 =
}
passdb {
   args = /etc/dovecot/dovecot-ldap.conf.ext
   driver = ldap
}
protocols = " imap lmtp pop3"
service auth-worker {
   user = $default_internal_user
}
service auth {
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0660
     user = postfix
   }
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 993
     ssl = yes
   }
}
service lmtp {
   process_min_avail = 5
   unix_listener /var/spool/postfix/private/dovecot-lmtp {
     group = postfix
     mode = 0600
     user = postfix
   }
}
service pop3-login {
   inet_listener pop3 {
     port = 0
   }
   inet_listener pop3s {
     port = 0
   }
}
ssl_cert = </etc/letsencrypt/live/wc-rhyno.tech/fullchain.pem
ssl_key =  # hidden, use -P to show it
submission_host = localhost:25
userdb {
   driver = prefetch
}
protocol lmtp {
   mail_plugins = sieve
}
protocol lda {
   mail_plugins = sieve
}
protocol imap {
   imap_client_workarounds = tb-extra-mailbox-sep
}


2018. 08. 02. 0:48 keltezéssel, Aki Tuomi írta:
> protocol lmtp {
>     userdb {
>        driver = sql
>        args = /path/to/dovecot-sql.conf.ext
>     }
> }
>
>
>
> ---
> Aki Tuomi
> Dovecot oy
>
> -------- Original message --------
> From: Andras Kemeny <pdx at pdx.hu>
> Date: 02/08/2018 01:35 (GMT+02:00)
> To: dovecot at dovecot.org
> Subject: LMTP error, mysterious
>
> hi (especially to you, Aki),
>
> so to solve the previous UID issue, i went the full LMTP route. however,
> i seem to be having problems with the prefetch userdb (i'm trying to
> minimize load on the LDAP server). namely, the log says:
>
> Aug  2 00:15:35 rhyno postfix/submission/smtpd[21158]: 5EEF35C05C5:
> client=localhost[127.0.0.1], sasl_method=login, sasl_username=aik
> Aug  2 00:15:40 rhyno postfix/cleanup[22201]: 5EEF35C05C5:
> message-id=<20180801221535.5EEF35C05C5 at beach.rhyno.tech>
> Aug  2 00:15:40 rhyno postfix/qmgr[17437]: 5EEF35C05C5:
> from=<pdx at pdx.hu>, size=295, nrcpt=1 (queue active)
> Aug  2 00:15:40 rhyno dovecot: lmtp(20321): Connect from local
> Aug  2 00:15:40 rhyno dovecot: auth: Error: prefetch(aik at rhyno.tech):
> userdb lookup not possible with only userdb prefetch
> Aug  2 00:15:40 rhyno dovecot: lmtp(aik at rhyno.tech): Error: user
> aik at rhyno.tech: Auth USER lookup failed
> Aug  2 00:15:41 rhyno postfix/lmtp[22211]: 5EEF35C05C5:
> to=<aik at rhyno.tech>, relay=beach.rhyno.tech[private/dovecot-lmtp],
> delay=13, delays=13/0.01/0/0.03, dsn=4.3.0, status=deferred (host
> beach.rhyno.tech[private/dovecot-lmtp] said: 451 4.3.0 <aik at rhyno.tech>
> Internal error occurred. Refer to server log for more information. (in
> reply to RCPT TO command))
> Aug  2 00:15:41 rhyno dovecot: lmtp(20321): Disconnect from local:
> Successful quit
> Aug  2 00:15:42 rhyno postfix/submission/smtpd[21158]: disconnect from
> localhost[127.0.0.1] ehlo=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=6
>
> (the above is a transcript of a full session i've done over telneting to
> localhost 587 and auth login-ing with valid credentials)
>
> so, i've tested the actual login process, and it works flawlessly, and
> it looks like IMAP is up and running:
>
> Connected to localhost.
> Escape character is '^]'.
> * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE
> IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
> 0 login aik at rhyno.tech ofCourseThisIsN0TtheRealPassword
> 0 OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE
> IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
> THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN
> NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH
> ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE
> SPECIAL-USE] Logged in
> 1 list "" "%"
> * LIST (\HasNoChildren \Sent) "." Sent
> * LIST (\HasNoChildren \Trash) "." Trash
> * LIST (\HasNoChildren) "." INBOX
> 1 OK List completed (0.000 + 0.000 secs).
> 2 status INBOX (MESSAGES)
> * STATUS INBOX (MESSAGES 2)
> 2 OK Status completed (0.000 + 0.000 secs).
>
> this is how i send the test mails:
>
> Connected to localhost.
> Escape character is '^]'.
> 220 beach.rhyno.tech mail server
> ehlo x
> 250-beach.rhyno.tech
> 250-PIPELINING
> 250-SIZE 10240000
> 250-ETRN
> 250-STARTTLS
> 250-AUTH PLAIN LOGIN
> 250-AUTH=PLAIN LOGIN
> 250-ENHANCEDSTATUSCODES
> 250-8BITMIME
> 250-DSN
> 250 SMTPUTF8
> auth login
> 334 VXNlcm5hbWU6
> ***obviously_masked***
> 334 UGFzc3dvcmQ6
> ***obviously_masked***
> 235 2.7.0 Authentication successful
> mail from:<pdx at pdx.hu>
> 250 2.1.0 Ok
> rcpt to:<aik at rhyno.tech>
> 250 2.1.5 Ok
> data
> 354 End data with <CR><LF>.<CR><LF>
> test
> .
> 250 2.0.0 Ok: queued as 5EEF35C05C5
> quit
> 221 2.0.0 Bye
> Connection closed by foreign host.
>
> my concern is these two:
>
> Aug  2 00:15:40 rhyno dovecot: auth: Error: prefetch(aik at rhyno.tech):
> userdb lookup not possible with only userdb prefetch
> Aug  2 00:15:40 rhyno dovecot: lmtp(aik at rhyno.tech): Error: user
> aik at rhyno.tech: Auth USER lookup failed
>
> 10-auth.conf has these settings:
>
> passdb {
>   driver = ldap
>   args = /etc/dovecot/dovecot-ldap.conf.ext
> }
> userdb {
>   driver = prefetch
> }
>
> dovecot-ldap.conf.ext has these settings (only the relevant ones)
>
> dn = ***whatever, it works***
> dnpass = ***whatever, it works***
> auth_bind = no
> base = dc=rhyno,dc=tech
> pass_attrs = \
>   =user=%{ldap:uid}, \
>   =password=%{ldap:userPassword}, \
>   =userdb_home=%{ldap:homeDirectory}, \
>   =userdb_uid=%{ldap:uidNumber}, \
>   =userdb_gid=%{ldap:gidNumber}
> pass_filter =
> (&(objectclass=postfixUser)(mailacceptinggeneralid=%n)(mailacceptinggeneralid=@%d))
>
> so what am i missing? also, this format of setting variables
> (=<output_field>=%{<whatever_special_result_field>}) is never explained
> on the wiki (or am i just blind?)
>
> thanks in advance,
> a
>

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