voldial log

using: 
#echo "bodyfornail" | nail -r some.address@gmail.com -s "test from nail" roott@u5y.net

generated:

tail -f /var/log/maillog

Dec 31 02:47:00 mail postfix/pickup[5929]: DAB2A9C038: uid=0 from=<some.address@gmail.com>
Dec 31 02:47:00 mail postfix/cleanup[5936]: DAB2A9C038: message-id=<4efebdf4.9tkVHDRMVCtdFNaQ%some.address@gmail.com>
Dec 31 02:47:00 mail postfix/qmgr[5930]: DAB2A9C038: from=<some.address@gmail.com>, size=436, nrcpt=1 (queue active)
Dec 31 02:47:00 mail postfix/local[5938]: DAB2A9C038: to=<roott@u5y.net>, relay=local, delay=0.04, delays=0.02/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "roott")
Dec 31 02:47:00 mail postfix/cleanup[5936]: E17779C039: message-id=<20111231074700.E17779C039@mail.u5y.net>
Dec 31 02:47:00 mail postfix/qmgr[5930]: E17779C039: from=<>, size=2077, nrcpt=1 (queue active)
Dec 31 02:47:00 mail postfix/bounce[5939]: DAB2A9C038: sender non-delivery notification: E17779C039
Dec 31 02:47:00 mail postfix/qmgr[5930]: DAB2A9C038: removed
Dec 31 02:47:01 mail postfix/smtp[5940]: E17779C039: to=<some.address@gmail.com>, relay=gmail-smtp-in.l.google.com[74.125.45.26]:25, delay=0.55, delays=0/0.01/0.17/0.36, dsn=2.0.0, status=sent (250 2.0.0 OK 1325317668 i67si38295919yhk.149)
Dec 31 02:47:01 mail postfix/qmgr[5930]: E17779C039: removed