[Dovecot] 'unknown user' using dovecot LDA

[Tom Hendrikx]

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On 22-12-13 16:43, Charles Marcus wrote:
> Ok, one more issue to resolve.
> 
> The old server was still using the postfix/virtual for delivery,
> but the new one is using the dovecot LDA.
> 
> Now, when an email generated locally by a cron job is delivered,
> this shows in the log:
> 
> 2013-12-22T10:29:55-05:00 host postfix/pickup[31400]:
> C67FD90F676B2: uid=0 from=<newsrv+rkhunter at example.com> 
> 2013-12-22T10:29:55-05:00 host postfix/cleanup[22349]:
> C67FD90F676B2: 
> message-id=<20131222152955.C67FD90F676B2 at smtp2.example.com> 
> 2013-12-22T10:29:55-05:00 host postfix/qmgr[31401]: C67FD90F676B2: 
> from=<newsrv+rkhunter at example.com>, size=1555, nrcpt=1 (queue
> active) 2013-12-22T10:29:55-05:00 host dovecot:
> auth-worker(22365): passwd(user1 at example.com): unknown user

This is an error from the passwd authentication backend, not from the
mysql one you're checking below. Seems that you have 2 auth backends
enabled in dovecot...

> 2013-12-22T10:29:55-05:00 host dovecot: lda(user1 at example.com): 
> msgid=<20131222152955.C67FD90F676B2 at smtp2.example.com>: saved mail
> to INBOX 2013-12-22T10:29:55-05:00 host postfix/pipe[22361]:
> C67FD90F676B2: to=<user1+rkhunter-report at example.com>,
> relay=dovecot, delay=0.06, delays=0.02/0/0/0.04, dsn=2.0.0,
> status=sent (delivered via dovecot service) 
> 2013-12-22T10:29:55-05:00 host postfix/qmgr[31401]: C67FD90F676B2:
> removed
> 
> The mail was delivered (as the log also clearly shows), but what is
> with the 'unknown user'?
> 
> I'm not sure how I can test my maps with dovecot, but testing with 
> postfix shows:
> 
> # postmap -q user1 at example.com
> mysql:/etc/postfix/maps/mysql/vmm.cf example.com/user1/
> 
> Which is correct.
> 
> And my dovecot-sql-conf.ext contains:
> 
> driver = mysql connect = "host=localhost dbname=db_name user=dbuser
> password=password" default_pass_scheme = CRYPT password_query = \ 
> SELECT username AS user, password \ FROM mailbox WHERE username =
> '%u' user_query = \ SELECT CONCAT('/var/vmail/', maildir) AS home
> \ FROM mailbox WHERE username = '%u' iterate_query = SELECT
> username AS user FROM mailbox
> 
> I confirmed the db info is identical to what postfix is using.
> 
> Oh - and in order to make sure that all usernames are lowercased, 
> shouldn't I change '%u' above to '%Lu'?
> 
> Appreciate any suggestions on where to go next... thanks
> 

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