Voilà le log pendant l'envoi d'un message à user@laposte.net

Aug 8 19:45:03 smtp postfix/smtpd[18812]: connect from smtp.mondomaine.com[192.168.0.5]
Aug 8 19:45:03 smtp postfix/smtpd[18812]: E3589C54060: client=smtp.mondomaine.com[192.168.0.5]
Aug 8 19:45:03 smtp postfix/cleanup[18815]: E3589C54060: message-id=<1155059103.18754.0.camel@smtp.mondomaine.com>
Aug 8 19:45:03 smtp postfix/qmgr[18752]: E3589C54060: from=<sebastien@mondomaine.com>, size=536, nrcpt=1 (queue active)
Aug 8 19:45:04 smtp postfix/smtpd[18812]: disconnect from smtp.mondomaine.com[192.168.0.5]
Aug 8 19:45:34 smtp postfix/smtp[18816]: connect to smtp1.laposte.net[81.255.54.11]: Connection timed out (port 25)
Aug 8 19:45:34 smtp postfix/smtp[18816]: E3589C54060: to=<user@laposte.net>, relay=none, delay=31, status=deferred (connect to smtp1.laposte.net[81.255.54.11]: Connection timed out)