Mailserver: Debian, Postfix, Dovecot

I'm trying to set up a Dovecot and Postfix mailserver. My wishes for the server:

• IMAPS
• SMTP (secure if is it an option?)
• Both IMAPS and SMTP must require an user from MySQL, same table.
• Mails are stored as maildir in /home/mail/domain/account

That's it so far I think, however I succeeded to mess something somewhere. Right now I'm stuck at receiving mails, which I believe is the first part.

I get this this in mail.

Sep  1 22:04:38 Debian-60-squeeze-64-minimal postfix/smtpd[9490]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled
Sep  1 22:04:38 Debian-60-squeeze-64-minimal postfix/smtpd[9490]: connect from xxx.yyy.dk[xx.xx.200.10]
Sep  1 22:04:38 Debian-60-squeeze-64-minimal dovecot: auth(default): new auth connection: pid=9490
Sep  1 22:04:39 Debian-60-squeeze-64-minimal postfix/smtpd[9490]: 06A5118F4F19: client=xxx.yyy.dk[xx.xx.200.10]
Sep  1 22:04:39 Debian-60-squeeze-64-minimal postfix/cleanup[9493]: 06A5118F4F19: message-id=<090BEFE4-DEE6-4A94-80F3-F9574044358E@yyy.dk>
Sep  1 22:04:39 Debian-60-squeeze-64-minimal postfix/qmgr[9342]: 06A5118F4F19: from=<zzz@yyy.dk>, size=11227, nrcpt=1 (queue active)
Sep  1 22:04:39 Debian-60-squeeze-64-minimal postfix/smtpd[9490]: disconnect from xxx.yyy.dk[xx.xx.200.10]
Sep  1 22:04:39 Debian-60-squeeze-64-minimal postfix/qmgr[9342]: warning: connect to transport private/dovecot: No such file or directory
Sep  1 22:04:39 Debian-60-squeeze-64-minimal postfix/error[9494]: 06A5118F4F19: to=<uuu@hhh.dk>, relay=none, delay=0.14, delays=0.13/0.01/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)

This line in mail.warn

Sep  1 22:04:38 Debian-60-squeeze-64-minimal postfix/smtpd[9490]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled

Please, not just a link to a tutorial, have tried the whole day to figure this one out. Thanks.

I have this main.cnf

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
append_dot_mydomain = no
#delay_warning_time = 4h
myhostname = xxx.dk
myorigin = xxx.dk
mydestination = localhost, localhost.localdomain
relayhost =
mynetworks = 127.0.0.0/8
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

# Virtual mailbox settings
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_base = /home/mail
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_minimum_uid = 5000
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
# SASL Authentication
smtpd_sasl_auth_enable = yes
smtpd_sasl_exceptions_networks = $mynetworks
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth

smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
message_size_limit = 30720000
virtual_alias_domains =
smtpd_sasl_authenticated_header = yes
smtpd_use_tls = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
virtual_create_maildirsize = yes
virtual_maildir_extended = yes
virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailbox_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = "The user you are trying to reach is over quota."
virtual_overquota_bounce = yes
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $send$

This is the relevant line in master.cf I think

maildrop unix - n n - - pipe 
flags=DRhu user=mail argv=/usr/lib/dovecot/deliver -d ${recipient}

This happens if I execute /usr/lib/dovecot/deliver
I think I can execute it.

# /usr/lib/dovecot/deliver
Fatal: destination user parameter (-d user) not given

Or

# /usr/lib/dovecot/deliver -d emil

(nothing happens then).
Neither cases provided any folders in /home/mail