Hi there. Just completed the migration from sendmail to postfix.
It's all working fine for all machines (30+) but one. This client is using Outlook and when sending a message, Outlook fails and displays: "The server responded: 504 5.5.2 <MASUKA>: Helo" MASUKA is the name of this laptop. It can send fine using Thunderbird however. Googling that error doesn't gave much useful answers. Any ideas of a work around ? Thank you # postconf mail_version mail_version = 2.5.5 # postconf -n: biff = no 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 header_checks = pcre:/etc/postfix/custom_header_checks html_directory = /usr/share/doc/postfix/html inet_interfaces = all local_header_rewrite_clients = mail_owner = _postfix mailbox_size_limit = 0 mailbox_transport = dovecot mailq_path = /usr/bin/mailq manpage_directory = /usr/share/man maps_rbl_domains = message_size_limit = 15728640 mydestination = $myhostname, localhost.$mydomain, localhost $mydomain mydomain = hydrix.com mydomain_fallback = localhost myhostname = mail.hydrix.com mynetworks = 127.0.0.0/8,192.168.0.0/23 newaliases_path = /usr/bin/newaliases queue_directory = /private/var/spool/postfix readme_directory = /usr/share/doc/postfix recipient_canonical_maps = pcre:/etc/postfix/canonical recipient_delimiter = + relayhost = sample_directory = /usr/share/doc/postfix/examples sendmail_path = /usr/sbin/sendmail setgid_group = _postdrop smtpd_client_restrictions = permit_mynetworks permit_sasl_authenticated reject_rbl_client zen.spamhaus.org permit smtpd_enforce_tls = no smtpd_helo_required = yes smtpd_helo_restrictions = reject_invalid_helo_hostname reject_non_fqdn_helo_hostname smtpd_pw_server_security_options = gssapi,cram-md5,plain,login smtpd_recipient_restrictions = permit_sasl_authenticated permit_mynetworks reject_unauth_destination check_policy_service unix:private/policy permit smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_security_options = noanonymous, noplaintext smtpd_sasl_tls_security_options = noanonymous smtpd_tls_CAfile = /etc/certificates/*.domain.com.8867E7D7D51B86638E02CD570752FE19F1D53683.chain.pem smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/certificates/*.domain.com.8867E7D7D51B86638E02CD570752FE19F1D53683.cert.pem smtpd_tls_exclude_ciphers = SSLv2, aNULL, ADH, eNULL smtpd_tls_key_file = /etc/certificates/*.domain.com.8867E7D7D51B86638E02CD570752FE19F1D53683.key.pem smtpd_use_pw_server = yes smtpd_use_tls = yes tls_random_source = dev:/dev/urandom unknown_local_recipient_reject_code = 550 virtual_alias_domains = $virtual_alias_maps hash:/etc/postfix/virtual_domains virtual_alias_maps = $virtual_maps hash:/etc/postfix/virtual_users
