Hi,
I have a 10.4.2 server. I can use Thunderbird and Mail.app to send using plain password auth on SMTP. Outlook 2003 sends and then receives a message in the inbox saying 554 Relay Access Denied.
The Outlook client is in the local lan.
Here's the mail server config:
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
enable_server_options = yes
html_directory = no
inet_interfaces = all
mail_owner = postfix
mailbox_size_limit = 0
mailbox_transport = cyrus
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
mydomain = woodscharter.org
mydomain_fallback = localhost
myhostname = woodscharter.org
mynetworks = 127.0.0.0/8
mynetworks_style = host
newaliases_path = /usr/bin/newaliases
queue_directory = /private/var/spool/postfix
readme_directory = /usr/share/doc/postfix
sample_directory = /usr/share/doc/postfix/examples
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_pw_server_security_options = plain
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination,permit
smtpd_sasl_auth_enable = yes
smtpd_tls_key_file =
smtpd_use_pw_server = yes
unknown_local_recipient_reject_code = 550
virtual_mailbox_domains = hash:/etc/postfix/virtual_domains
virtual_transport = lmtp:unix:/var/imap/socket/lmtp