I am getting the below error when I try to send email from a pc from the same network using sasl authentication to the postfix server.
Oct 24 23:02:36 server postfix/smtp[25874]: 7349F21003C: to=< rhd...@gmail.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.07, delays=0.05/0.01/0/0.01, dsn=5.0.0, status=bounced (host 127.0.0.1[127.0.0.1] said: 558 Relaying denied: domain not valid Below here is the postconf -n result. I am using vams, spampd as a proxy server for spamassassin all running on the same server. This postfix configuration has been used to relay mail to a Domino server for over a year. The only addition I have added was the sasl authentication so I can use is as smtp server. alias_maps = hash:/etc/postfix/mailusers broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix content_filter = smtp:[127.0.0.1]:10024 daemon_directory = /usr/libexec/postfix debug_peer_level = 2 header_checks = regexp:/etc/postfix/header_checks html_directory = no inet_interfaces = all local_recipient_maps = hash:/etc/postfix/mailusers mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, $mydomain, localhost mydomain = domain.com myhostname = email3.domain.com mynetworks = 10.0.0.0/24, 127.0.0.1/32 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.2.10/README_FILES relay_domains = 10.0.0.0/24 sample_directory = /etc/postfix sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_recipient_restrictions = reject_non_fqdn_recipient reject_non_fqdn_sender permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_unauth_pipelining reject_invalid_hostname smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = domain.com smtpd_sasl_path = smtpd smtpd_sasl_security_options = noanonymous smtpd_sasl_tls_security_options = $smtp_sasl_security_options transport_maps = hash:/etc/postfix/keytrans unknown_local_recipient_reject_code = 550 Any ideas?