We just setup a Linux open relay and got the following:
DEBUG: setDebug: JavaMail version 1.4.5
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "192.168.1.25", port 25, isSSL false
220 itlin01.corp.a10networks.com ESMTP Sendmail 8.13.8/8.13.8; Wed, 24 Apr 2013 14:27:19 -0700
DEBUG SMTP: connected to host "192.168.1.25", port: 25
EHLO localhost.localdom
250-itlin01.corp.a10networks.com Hello [172.16.0.36], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH DIGEST-MD5 CRAM-MD5
250-DELIVERBY
250 HELP
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: Found extension "ETRN", arg ""
DEBUG SMTP: Found extension "AUTH", arg "DIGEST-MD5 CRAM-MD5"
DEBUG SMTP: Found extension "DELIVERBY", arg ""
DEBUG SMTP: Found extension "HELP", arg ""
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
