text_combined: bill cole wznfvpntxiwv823303billmailscconsultcom 914 0500 3608 jordan wrote 3508 patrick ben koetter wrote 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 output smtp session appears true statement ill try guess youve adulterated hand telnet smtpcompany1com 25 trying 2315 connected mymailemailhostcom escape character 220 helo itapache 250 mymailemailhostcom quit 221 mymailemailhostcom connection closed foreign host looks like mail server behind misconfigured cisco pix asa firewall need fix cisco delusion know make smtp less dangerous forcing application layer proxy front victim mail servers hides critical information clients refuses pass certain commands server fingerprint delusional misfeature banner full asterisks bill cole ydpuscconsultcom fri 08 aug 2008 072059 0500 postfix using correct command helo vs ehlo