Postfix and virtual_transport = maildrop

[Andrea Ganduglia <nonews.org@gmail.com>]

Hello --

I need some help in here :-/

I have a Debian-box well configured with
Postfix+saslauthd+dovecot+spamassassin. Mail accounts are virtual,
with password stored into MySQL and messages store into /home/vmail.

I would like introduce maildrop in delivery chain, basically for move
spam messages into proper .Junk account folder, but it's not so easy
as I expected.

I followed logic steps of this HOWTO (Maildrop section)
http://dertompson.com/2008/02/13/mail-server-setup-for-debian-etch

but if I set

virtual_transport = maildrop

in /etc/postfix/main.cf, messages are not delivered and log returns
those errors:

Jun 29 23:57:21 example postfix/pipe[28200]: 449B22548191:
to=<info@***>, relay=spamassassin, delay=0.16, delays=0.05/0/0/0.11,
dsn=2.0.0, status=sent (delivered via spamassassin service)
Jun 29 23:57:21 example postfix/error[28168]: 69FCB25481B2:
to=<info@***>, relay=none, delay=0.01, delays=0/0/0/0, dsn=4.3.0,
status=deferred (unknown mail transport error)

in short:

relay=none (unknown mail transport error)

If I use procmail --as a shot, because it doesn't works with virtual
accounts-- instead maildrop, I obtain the same error.

Any suggestions?

Relevant lines in /etc/postfix/master.cf

smtp      inet  n       -       n       -       -       smtpd -o
content_filter=spamassassin
maildrop  unix  -       n       n       -       -       pipe
 flags=DRhu user=postfix argv=/usr/bin/maildrop -d ${recipient}
spamassassin unix -     n       n       -       -       pipe
user=spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f
${sender} ${recipient}

And my /etc/postfix/main.cf

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
append_dot_mydomain = no
readme_directory = no
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
myhostname = example.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = example.com, localhost.net, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_gid_maps = static:105
virtual_mailbox_base = /home/vmail/
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 102
virtual_transport = virtual
#virtual_transport = maildrop
#maildrop_destination_recipient_limit = 1
virtual_uid_maps = static:102
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions =
 permit_mynetworks,
 permit_sasl_authenticated,
 reject_non_fqdn_hostname,
 reject_non_fqdn_sender,
 reject_non_fqdn_recipient,
 reject_unauth_destination,
 reject_unauth_pipelining,
 reject_invalid_hostname
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
header_checks = regexp:/etc/postfix/header_checks

Thanks!

-Andrea

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