i am trying to setup postfix on a server at my house it uses dyndns.com for a dynmaic IP and i am access it from a pc on my local network usin a local network IP if that makes any difference. When i try to send an email from outlook i got this output form wireshark Code: 220 domain.homelinux.com ESMTP Postfix EHLO BOBDESK 250-domain.homelinux.com 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH LOGIN PLAIN 250-AUTH=LOGIN PLAIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN MAIL FROM: <[email protected]> 250 2.1.0 Ok RCPT TO: <[email protected]> 554 5.7.1 <[email protected]>: Relay access denied QUIT 221 2.0.0 Bye this is my postfix config from /etc/postfix/main.cf Code: queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix mail_owner = postfix myhostname = domain.homelinux.com mydomain = domain.homelinux.com inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost unknown_local_recipient_reject_code = 550 relay_domains = $mydestination relayhost = smtp.isp.co.nz alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mail_spool_directory = /var/mail sendmail_path = /usr/sbin/sendmail.postfix newaliases_path = /usr/bin/newaliases.postfix mailq_path = /usr/bin/mailq.postfix setgid_group = postdrop html_directory = no manpage_directory = /usr/share/man sample_directory = /usr/share/doc/postfix-2.3.3/samples readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES smtpd_sasl_local_domain = smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination mynetworks = 127.0.0.0/8 smtpd_tls_auth_only = no smtp_use_tls = yes smtpd_use_tls = yes smtp_tls_note_starttls_offer = yes smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom myhostname = domain.homelinux.com and here is the line from /var/log/maillog Code: May 29 07:29:06 ratcat postfix/smtpd[2806]: NOQUEUE: reject: RCPT from unknown[10.1.1.3]: 554 5.7.1 <[email protected]>: Relay access denied; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<BOBDESK> BOBDESK and 10.1.1.3 are the name and ip of the pc i was using to send the email from. Scott.