我收到以下相当烦人的错误消息：
Sender address rejected: not owned by user subscription@****.ca; from=<subscription@****.ca> to=<webmaster@****.ca> proto=ESMTP helo=<[192.168.2.34]>
而我的postconf -n：
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
canonical_maps = hash:/etc/postfix/canonical
config_directory = /etc/postfix
default_destination_concurrency_limit = 5
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
home_mailbox = Maildir/
inet_interfaces = all
mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/99-mail-stack-delivery.conf -m "${EXTENSION}"
mailbox_size_limit = 0
message_size_limit = 104857600
milter_connect_macros = j {daemon_name} v {if_name} _
milter_default_action = accept
mydestination = localhost
myhostname …