Here's the problem: $ telnet mail.intellinetinc.com smtp Trying 139.142.54.37... Connected to h139-142-54-37.gtcust.grouptelecom.net. Escape character is '^]'. 220 intellinetinc.com ESMTP Sendmail 8.12.4/8.12.4; Thu, 23 Jan 2003 01:28:23 -0700 (MST) ehlo joe 250-intellinetinc.com Hello franconia.calvaedi.com [213.39.1.226], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-EXPN 250-VERB 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-DELIVERBY 250 HELP mail from: <> 550 5.7.1 <>... Command rejected
That's bad. See rfc1123, section 5.2.9, or http://www.rfc-ignorant.org/policy-dsn.php Not a cyrus bug, a sendmail configuration bug.
