warning: transport virtual failure

3 msg	Server configuration Error
1 msg	relay_transport
1 msg	Catch-all mailbox
4 msg	Trouble with HTC S710 device and SMTPS
3 msg	psotfix server TLS failed
3 msg	failed-delivery message notifications setup
2 msg	proxy_interfaces understanding

warning: transport virtual failure
\ Floyd Arguello (16 Jan 2008)

2 msg	how to relay for most recipients and forward fo...
2 msg	Rewriting outbound addresses
2 msg	virtual mailboxes/domains and aliases
3 msg	Enforced TLS Success?
1 msg	Postfix 2.5 RC2 and snapshot release
11 msg	Problem with Postfix and LDAP (SSL / TLS)
4 msg	More on Enforced TLS
3 msg	delivery reciept
4 msg	How to repeat delay_warning_time messages ?
2 msg	sender notification
5 msg	Using 'nolisting' to reduce spam
1 msg	mail priority by sender

Subject:	warning: transport virtual failure
Group:	Postfix-users
From:	Floyd Arguello
Date:	16 Jan 2008

I just migrated our mailserver and upgraded to the latest and greatest
release. I inherited this, and wasn't involved with the initial setup
and config. I'm pretty new to Postfix, and prior to this only worked
with Sendmail. Have to say that I really like Postfix.

We use MySQL for our virtual maps, dovecot and amavis - and everything
works. However, messages are delayed, and I see a lot of entries like
this in our maillog:
--
Jan 16 15:32:29 mail postfix/error[31458]: 98FF7198661:
to=<pat>, relay=none, delay=25334, delays=25334/0.04/0/0,
dsn=4.3.0, status=deferred (unknown mail transport error)
Jan 16 15:32:29 mail postfix/error[31466]: AAA0D19865E:
to=<happy>, relay=none, delay=25496, delays=25495/0.1/0/0,
dsn=4.3.0, status=deferred (unknown mail transport error)
Jan 16 15:32:29 mail postfix/qmgr[27598]: warning: private/virtual
socket: malformed response
Jan 16 15:32:29 mail postfix/qmgr[27598]: warning: transport virtual
failure -- see a previous warning/fatal/panic logfile record for the
problem description
--

When I grep for warning/fatal/panic, I see entries like this:
--
Jan 16 16:35:37 mail postfix/master[4323]: warning: process
/usr/libexec/postfix/virtual pid 2557 killed by signal 11
Jan 16 16:35:37 mail postfix/master[4323]: warning:
/usr/libexec/postfix/virtual: bad command startup -- throttling
Jan 16 16:32:53 mail postfix/smtpd[1619]: warning: 92.113.69.243:
hostname 243-69-113-92.pool.ukrtel.net verification failed: Name or
service not known
--

postconf -n is posted at the end of this message. I've pored over the
docs on postfix.org, not to mention that I googled the hell out the
error messages. I must be mission something, because I can't find a
solution.

Any insight/help would be appreciated.

Floyd

postconf -n:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
allow_untrusted_routing = no
bounce_notice_recipient = postmaster
bounce_size_limit = 65536
bounce_template_file = /etc/postfix/bounce.cf
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = lmtp:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
default_destination_concurrency_limit = 10
default_privs = nobody
disable_vrfy_command = yes
header_size_limit = 32768
home_mailbox = Maildir
html_directory = /etc/postfix/html
in_flow_delay = 1s
inet_interfaces = all
local_destination_concurrency_limit = 6
local_recipient_maps = $alias_maps, $virtual_mailbox_maps
mail_owner = postfix
mailbox_size_limit = 0
mailq_path = /usr/bin/mailq
manpage_directory = /usr/local/man
message_size_limit = 40960000
mydestination = $myhostname, localhost
mydomain = ourdomain.com
myhostname = mail.ourdomain.com
mynetworks = 67.192.36.218/32, 127.0.0.0/8
myorigin = ourdomain.com
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /etc/postfix/readme
recipient_bcc_maps = hash:/etc/postfix/maps/recipient_bcc
recipient_delimiter = +
sample_directory = /etc/postfix/sample
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtp_tls_CAfile = /etc/ssl/rapidssl.crt
smtp_tls_cert_file = /etc/ssl/ourdomain.com.crt
smtp_tls_key_file = /etc/ssl/ourdomain.com.pem
smtp_use_tls = yes
smtpd_banner = $myhostname
smtpd_client_restrictions =
permit_mynetworks,
reject_unauth_pipelining
smtpd_etrn_restrictions =
permit_mynetworks,
check_etrn_access hash:/etc/postfix/maps/etrn_domains,
reject
smtpd_hard_error_limit = 25
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,
reject_invalid_helo_hostname,
reject_unauth_pipelining
smtpd_recipient_limit = 128
smtpd_recipient_restrictions =
reject_rbl_client sbl-xbl.spamhaus.org,
reject_rbl_client dnsbl.njabl.org,
reject_rbl_client multihop.dsbl.org,
reject_rbl_client list.dsbl.org,
reject_rbl_client dnsbl.ahbl.org,
reject_rbl_client dnsbl.njabl.org,
permit_mynetworks,
reject_unauth_destination,
reject_non_fqdn_recipient,
reject_unlisted_recipient,
reject_multi_recipient_bounce,
reject_unauth_pipelining,
reject_unverified_sender,
reject_unverified_recipient
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
smtpd_sender_restrictions =
permit_mynetworks,
reject_unknown_sender_domain,
reject_non_fqdn_sender,
check_sender_access hash:/etc/postfix/maps/bad_senders,
reject_unauth_pipelining
smtpd_soft_error_limit = 10
smtpd_timeout = 180
smtpd_tls_CAfile = /etc/ssl/ssl.crt
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/ourdomain.com.crt
smtpd_tls_key_file = /etc/ssl/ourdomain.com.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
soft_bounce = yes
strict_rfc821_envelopes = yes
tls_random_source = dev:/dev/urandom
virtual_alias_maps = mysql:/etc/postfix/maps/mysql-virtual.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /home/mailusers/ourdomain.com
virtual_mailbox_domains = hash:/etc/postfix/maps/relay_domains
virtual_mailbox_maps = mysql:/etc/postfix/maps/mysql-virtual-maps.cf
virtual_minimum_uid = 2000
virtual_uid_maps = static:2000