text_combined: patrick ben koetter bstateofmindde jordan hello strange problem using postfix using email program request tracker company several different email domains another company hosts email relayhost setup new outgoing email email hosting company email domains split across two different servers due merger another company basically send email one domain company1com without problem domain require stmp authentication since hosted server try send email domain rejected 553 error message states 553 sorry domain isnt list allowed rcpthosts 571 reply rcpt command pulling varlogmailinfo happening postfix sending helo instead ehlo even attempting use authentication confirmed tcpdump remote server introduce promote esmtp smtp banner brick trying get fixed nothing tried far working using ubuntu server 606 relevant configuration information postconf grep version mail_version 245 etcpostfixmaincf see usrsharepostfixmaincfdist commented complete version debian specific specifying file name cause first line file used name debian default etcmailname myorigin etcmailname smtpd_banner myhostname esmtp mail_name biff appending domain muas job append_dot_mydomain uncomment next line generate delayed mail warnings delay_warning_time 4h tls parameters smtpd_tls_cert_fileetcsslcertssslcertsnakeoilpem smtpd_tls_key_fileetcsslprivatesslcertsnakeoilkey smtpd_use_tlsyes smtpd_tls_session_cache_database btreequeue_directorysmtpd_scache smtp_tls_session_cache_database btreequeue_directorysmtp_scache see usrsharedocpostfixtls_readmegz postfixdoc package information enabling ssl smtp client smtp auth settings relay smtp_sender_dependent_authentication yes sender_dependent_relayhost_maps hashetcpostfixsender_relay smtp_sasl_auth_enable yes smtp_always_send_ehlo yes smtp_sasl_password_maps hashetcpostfixsaslsasl_passwd smtp_sasl_security_options noanonymous smtp_sasl_mechanism_filter plain smtp_generic_maps hashetcpostfixgeneric myhostname itapache mydomain companylocal alias_maps hashetcaliases alias_database hashetcaliases myorigin etcmailname mydestination myhostname myhostnamemydomain localhostmydomain localhost relayhost smtpcompany1com mynetworks 1270008 mailbox_size_limit 0 recipient_delimiter inet_interfaces loopbackonly etcpostfixsender_relay persender provider company1com smtpcompany1com company2com smtpcompany2com etcpostfixsaslsasl_passwd persender authentication smtpcompany1com agcompany1compassword123 agcompany1com rtcompany1compassword123 thanks help provide jordan book postfix saslfinger debugging smtp auth fri 08 aug 2008 114100 0100 postfix using correct command helo vs ehlo