the problem:
============

postmap -q tim@ginja.co.za hash:/etc/postfix/virtual
jonno@ginja.co.za

sendmail -bv tim@ginja.co.za
# probe email says <tim@ginja.co.za>: User unknown in virtual alias table

/etc/postfix/main.cf:
=====================

# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
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

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = lenny.localdomain
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = starjuice.net, ray.starjuice.net, localhost.localdomain, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
#mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

virtual_alias_domains = axl.starjuice.net, fatboy.starjuice.net, enova.co.za, ginja.co.za, thespoonroom.co.za
virtual_alias_map = hash:/etc/postfix/virtual
home_mailbox = Maildir/

/etc/postfix/virtual:
=====================

@axl.starjuice.net	@starjuice.net
@fatboy.starjuice.net	@starjuice.net

accounts@enova.co.za	sheldonh@enova.co.za
info@enova.co.za	sheldonh@enova.co.za
sales@enova.co.za	sheldonh@enova.co.za
sheldonh@enova.co.za	sheldonh@starjuice.net
support@enova.co.za	sheldonh@enova.co.za

jonno@ginja.co.za	jonno@cloof.co.za
tim@ginja.co.za		jonno@ginja.co.za

party@thespoonroom.co.za	kate@dishfood.co.za