上記でログはこうなりました｡

Jul 20 14:45:54 ubuntu postfix/master[15834]: daemon started -- version 3.3.0, configuration /etc/postfix
Jul 20 14:46:33 ubuntu postfix/tlsmgr[15968]: warning: request to update table btree:/etc/postfix/smtpd_scache in non-postfix directory /etc/postfix
Jul 20 14:46:33 ubuntu postfix/tlsmgr[15968]: warning: redirecting the request to postfix-owned data_directory /var/lib/postfix
Jul 20 14:46:33 ubuntu postfix/smtps/smtpd[15967]: connect from ubuntu[192.168.0.3]
Jul 20 14:46:42 ubuntu postfix/smtps/smtpd[15967]: 7698E2162573: client=ubuntu[192.168.0.3], sasl_method=PLAIN, sasl_username=userhoge
Jul 20 14:46:42 ubuntu postfix/cleanup[16003]: 7698E2162573: message-id=<1111-1111-1111-1111@ubuntu>
Jul 20 14:46:42 ubuntu postfix/qmgr[15836]: 7698E2162573: from=<userhoge@ubuntu>, size=587, nrcpt=1 (queue active)
Jul 20 14:46:42 ubuntu postfix/smtps/smtpd[15967]: disconnect from ubuntu[192.168.0.3] ehlo=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=6
Jul 20 14:47:12 ubuntu postfix/smtp[16004]: connect to smtp.ocn.ne.jp[153.149.231.65]:587: Connection timed out
Jul 20 14:47:42 ubuntu postfix/smtp[16004]: connect to smtp.ocn.ne.jp[153.149.232.193]:587: Connection timed out
Jul 20 14:47:42 ubuntu postfix/smtp[16004]: 7698E2162573: to=<ocnuser@***.ocn.ne.jp>,
　relay=none, delay=60, delays=0.06/0.02/60/0, dsn=4.4.1, status=deferred (connect to smtp.ocn.ne.jp[153.149.232.193]:587: Connection timed out)