Ok I set debug=4 and then I sent 5 mails as concurrent
mail.log;
Mar 22 10:13:37 postfix1 amavis[838]: starting. /usr/sbin/amavisd-new at postfix1.test.com amavisd-new-2.6.5 (20110407), Unicod
e aware
Mar 22 10:13:37 postfix1 amavis[838]: Perl version 5.012004
Mar 22 10:13:38 postfix1 amavis[934]: Net::Server: Group Not Defined. Defaulting to EGID '120 120'
Mar 22 10:13:38 postfix1 amavis[934]: Net::Server: User Not Defined. Defaulting to EUID '111'
Mar 22 10:13:38 postfix1 amavis[934]: Module Amavis::Conf 2.208
Mar 22 10:13:38 postfix1 amavis[934]: Module Archive::Zip 1.30
Mar 22 10:13:38 postfix1 amavis[934]: Module BerkeleyDB 0.48
Mar 22 10:13:38 postfix1 amavis[934]: Module Compress::Zlib 2.024
Mar 22 10:13:38 postfix1 amavis[934]: Module Convert::TNEF 0.17
Mar 22 10:13:38 postfix1 amavis[934]: Module Convert::UUlib 1.4
Mar 22 10:13:38 postfix1 amavis[934]: Module Crypt::OpenSSL::RSA 0.27
Mar 22 10:13:38 postfix1 amavis[934]: Module DBD::mysql 4.019
Mar 22 10:13:38 postfix1 amavis[934]: Module DBI 1.616
Mar 22 10:13:38 postfix1 amavis[934]: Module DB_File 1.82
Mar 22 10:13:38 postfix1 amavis[934]: Module Digest::MD5 2.39
Mar 22 10:13:38 postfix1 amavis[934]: Module Digest::SHA 5.47
Mar 22 10:13:38 postfix1 amavis[934]: Module IO::Socket::INET6 2.65
Mar 22 10:13:38 postfix1 amavis[934]: Module MIME::Entity 5.502
Mar 22 10:13:38 postfix1 amavis[934]: Module MIME::Parser 5.502
Mar 22 10:13:38 postfix1 amavis[934]: Module MIME::Tools 5.502
Mar 22 10:13:38 postfix1 amavis[934]: Module Mail::DKIM::Signer 0.39
Mar 22 10:13:38 postfix1 amavis[934]: Module Mail::DKIM::Verifier 0.39
Mar 22 10:13:38 postfix1 amavis[934]: Module Mail::Header 2.08
Mar 22 10:13:38 postfix1 amavis[934]: Module Mail::Internet 2.08
Mar 22 10:13:38 postfix1 amavis[934]: Module Mail::SPF v2.007
Mar 22 10:13:38 postfix1 amavis[934]: Module Mail::SpamAssassin 3.003002
Mar 22 10:13:38 postfix1 amavis[934]: Module Net::DNS 0.66
Mar 22 10:13:38 postfix1 amavis[934]: Module Net::LDAP 0.4001
Mar 22 10:13:38 postfix1 amavis[934]: Module Net::Server 0.99
Mar 22 10:13:38 postfix1 amavis[934]: Module NetAddr::IP 4.044
Mar 22 10:13:38 postfix1 amavis[934]: Module Socket6 0.23
Mar 22 10:13:38 postfix1 amavis[934]: Module Time::HiRes 1.9719
Mar 22 10:13:38 postfix1 amavis[934]: Module URI 1.58
Mar 22 10:13:38 postfix1 amavis[934]: Module Unix::Syslog 1.1
Mar 22 10:13:38 postfix1 amavis[934]: Amavis::DB code loaded
Mar 22 10:13:38 postfix1 amavis[934]: Amavis::Cache code loaded
Mar 22 10:13:38 postfix1 amavis[934]: SQL base code loaded
Mar 22 10:13:38 postfix1 amavis[934]: SQL::Log code loaded
Mar 22 10:13:38 postfix1 amavis[934]: SQL::Quarantine NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: Lookup::SQL code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: Lookup::LDAP code loaded
Mar 22 10:13:38 postfix1 amavis[934]: AM.PDP-in proto code loaded
Mar 22 10:13:38 postfix1 amavis[934]: SMTP-in proto code loaded
Mar 22 10:13:38 postfix1 amavis[934]: Courier proto code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: SMTP-out proto code loaded
Mar 22 10:13:38 postfix1 amavis[934]: Pipe-out proto code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: BSMTP-out proto code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: Local-out proto code loaded
Mar 22 10:13:38 postfix1 amavis[934]: OS_Fingerprint code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: ANTI-VIRUS code loaded
Mar 22 10:13:38 postfix1 amavis[934]: ANTI-SPAM code loaded
Mar 22 10:13:38 postfix1 amavis[934]: ANTI-SPAM-EXT code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: ANTI-SPAM-C code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: ANTI-SPAM-SA code loaded
Mar 22 10:13:38 postfix1 amavis[934]: Unpackers code loaded
Mar 22 10:13:38 postfix1 amavis[934]: DKIM code loaded
Mar 22 10:13:38 postfix1 amavis[934]: Tools code NOT loaded
Mar 22 10:13:38 postfix1 amavis[934]: Found $file at /usr/bin/file
Mar 22 10:13:38 postfix1 amavis[934]: Found $altermime at /usr/bin/altermime
Mar 22 10:13:38 postfix1 amavis[934]: Internal decoder for .mail
Mar 22 10:13:38 postfix1 amavis[934]: No decoder for .F
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .Z at /bin/uncompress
Mar 22 10:13:38 postfix1 amavis[934]: Internal decoder for .gz
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .bz2 at /bin/bzip2 -d
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .lzo at /usr/bin/lzop -d
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .rpm at /usr/bin/rpm2cpio
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .cpio at /usr/bin/pax
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .tar at /usr/bin/pax
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .deb at /usr/bin/ar
Mar 22 10:13:38 postfix1 amavis[934]: Internal decoder for .zip
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .7z at /usr/bin/7zr
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .rar at /usr/bin/unrar-free
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .arj at /usr/bin/arj
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .arc at /usr/bin/nomarch
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .zoo at /usr/bin/zoo
Mar 22 10:13:38 postfix1 amavis[934]: No decoder for .lha
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .doc at /usr/bin/ripole
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .cab at /usr/bin/cabextract
Mar 22 10:13:38 postfix1 amavis[934]: No decoder for .tnef
Mar 22 10:13:38 postfix1 amavis[934]: Internal decoder for .tnef
Mar 22 10:13:38 postfix1 amavis[934]: Found decoder for .exe at /usr/bin/unrar-free; /usr/bin/arj
Mar 22 10:13:38 postfix1 amavis[934]: Using primary internal av scanner code for ClamAV-clamd
Mar 22 10:13:38 postfix1 amavis[934]: Found secondary av scanner ClamAV-clamscan at /usr/bin/clamscan
Mar 22 10:13:38 postfix1 amavis[934]: Creating db in /var/lib/amavis/db/; BerkeleyDB 0.48, libdb 5.1
Mar 22 10:13:45 postfix1 postfix/master[1548]: daemon started -- version 2.8.5, configuration /etc/postfix
Mar 22 10:18:45 postfix1 postfix/qmgr[1551]: 2FD371020F31: from=<bulend@test.com>, size=6556, nrcpt=1 (queue active)
Mar 22 10:18:45 postfix1 postfix/qmgr[1551]: 1DB731020F55: from=<bulend@test.com>, size=6554, nrcpt=1 (queue active)
Mar 22 10:18:47 postfix1 postfix/smtp[1615]: 2FD371020F31: to=<maslakbulend@gmail.com>, relay=gmail-smtp-in.l.google.com[173.194.70.2
6]:25, delay=453, delays=451/0.18/0.2/1.4, dsn=2.0.0, status=sent (250 2.0.0 OK 1332404327 r59si4302079weq.123)
Mar 22 10:18:47 postfix1 postfix/qmgr[1551]: 2FD371020F31: removed
Mar 22 10:18:47 postfix1 postfix/smtp[1616]: 1DB731020F55: to=<ymmaslak@hotmail.com>, relay=mx2.hotmail.com[65.54.188.110]:25, delay
=452, delays=450/0.05/0.78/0.97, dsn=2.0.0, status=sent (250 <04ad01cd0803$552b2f30$ff818d90$@test.com> Queued mail for delivery)
Mar 22 10:18:47 postfix1 postfix/qmgr[1551]: 1DB731020F55: removed
Mar 22 10:21:29 postfix1 postfix/smtpd[1800]: connect from unknown[10.11.1.247]
Mar 22 10:21:30 postfix1 postfix/smtpd[1800]: 061561020F2D: client=unknown[10.11.1.247], sasl_method=LOGIN, sasl_username=bulend@test
.com
Mar 22 10:21:34 postfix1 postfix/cleanup[1804]: 061561020F2D: message-id=<04be01cd0804$c85afcf0$5910f6d0$@test.com>
Mar 22 10:21:34 postfix1 postfix/qmgr[1551]: 061561020F2D: from=<bulend@test.com>, size=5619, nrcpt=5 (queue active)
Mar 22 10:21:34 postfix1 postfix/smtpd[1815]: connect from localhost[127.0.0.1]
Mar 22 10:21:34 postfix1 postfix/smtpd[1815]: BB8EF1020F31: client=localhost[127.0.0.1]
Mar 22 10:21:34 postfix1 postfix/cleanup[1804]: BB8EF1020F31: message-id=<04be01cd0804$c85afcf0$5910f6d0$@test.com>
Mar 22 10:21:34 postfix1 postfix/smtpd[1816]: connect from localhost[127.0.0.1]
Mar 22 10:21:34 postfix1 postfix/smtpd[1816]: BF5241020F3A: client=localhost[127.0.0.1]
Mar 22 10:21:34 postfix1 postfix/cleanup[1817]: BF5241020F3A: message-id=<04be01cd0804$c85afcf0$5910f6d0$@test.com>
Mar 22 10:21:34 postfix1 postfix/smtpd[1815]: disconnect from localhost[127.0.0.1]
Mar 22 10:21:34 postfix1 postfix/qmgr[1551]: BB8EF1020F31: from=<bulend@test.com>, size=6549, nrcpt=1 (queue active)
Mar 22 10:21:34 postfix1 amavis[1185]: (01185-01) Passed CLEAN, MYNETS/MYUSERS LOCAL [10.11.1.247] [10.11.1.247] <bulend@test.com> ->
<maslak@test.com>, Message-ID: <04be01cd0804$c85afcf0$5910f6d0$@test.com>, mail_id: Czdj8PlCFbsH, Hits: -9.997, size: 5619, que
ued_as: BB8EF1020F31, 702 ms
Mar 22 10:21:34 postfix1 postfix/qmgr[1551]: BF5241020F3A: from=<bulend@test.com>, size=6553, nrcpt=1 (queue active)
Mar 22 10:21:34 postfix1 postfix/smtpd[1816]: disconnect from localhost[127.0.0.1]
Mar 22 10:21:35 postfix1 amavis[1186]: (01186-01) Passed CLEAN, MYNETS/MYUSERS LOCAL [10.11.1.247] [10.11.1.247] <bulend@test.com> ->
<maslakbulend@gmail.com>, Message-ID: <04be01cd0804$c85afcf0$5910f6d0$@test.com>, mail_id: l6tPo6EJa1GE, Hits: -9.997, size: 5619, q
ueued_as: BF5241020F3A, 763 ms
Mar 22 10:21:35 postfix1 postfix/smtp[1807]: 061561020F2D: to=<maslak@test.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=5.1, de
lays=4.3/0.01/0.01/0.81, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as BB8EF1020F31)
Mar 22 10:21:35 postfix1 postfix/smtp[1808]: 061561020F2D: to=<maslakbulend@gmail.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=5.2,
delays=4.3/0.01/0.01/0.86, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as BF5241020F3A)
Mar 22 10:21:35 postfix1 postfix/smtpd[1815]: connect from localhost[127.0.0.1]
Mar 22 10:21:35 postfix1 postfix/smtpd[1815]: 3055B1020F4D: client=localhost[127.0.0.1]
Mar 22 10:21:35 postfix1 postfix/cleanup[1804]: 3055B1020F4D: message-id=<04be01cd0804$c85afcf0$5910f6d0$@test.com>
Mar 22 10:21:35 postfix1 postfix/smtpd[1816]: connect from localhost[127.0.0.1]
Mar 22 10:21:35 postfix1 postfix/smtpd[1816]: 3F25E1020F55: client=localhost[127.0.0.1]
Mar 22 10:21:35 postfix1 postfix/cleanup[1817]: 3F25E1020F55: message-id=<04be01cd0804$c85afcf0$5910f6d0$@test.com>
Mar 22 10:21:35 postfix1 postfix/qmgr[1551]: 3055B1020F4D: from=<bulend@test.com>, size=6561, nrcpt=1 (queue active)
Mar 22 10:21:35 postfix1 amavis[1185]: (01185-02) Passed CLEAN, MYNETS/MYUSERS LOCAL [10.11.1.247] [10.11.1.247] <bulend@test.com> ->
<bulend.maslak@test.com>, Message-ID: <04be01cd0804$c85afcf0$5910f6d0$@test.com>, mail_id: hrxEFEgrmAfF, Hits: -9.997, size: 561
9, queued_as: 3055B1020F4D, 210 ms
Mar 22 10:21:35 postfix1 postfix/qmgr[1551]: 3F25E1020F55: from=<bulend@test.com>, size=6547, nrcpt=1 (queue active)
Mar 22 10:21:35 postfix1 amavis[1186]: (01186-02) Passed CLEAN, MYNETS/MYUSERS LOCAL [10.11.1.247] [10.11.1.247] <bulend@test.com> ->
<bulend@test.com>, Message-ID: <04be01cd0804$c85afcf0$5910f6d0$@test.com>, mail_id: FCdFBrwxjO3E, Hits: -9.997, size: 5619, queu
ed_as: 3F25E1020F55, 234 ms
Mar 22 10:21:35 postfix1 postfix/smtp[1807]: 061561020F2D: to=<bulend.maslak@test.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=5
.4, delays=4.3/0.83/0.01/0.3, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 3055B1020F4D)
Mar 22 10:21:35 postfix1 postfix/smtp[1808]: 061561020F2D: to=<bulend@test.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=5.5, del
ays=4.3/0.88/0.01/0.3, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 3F25E1020F55)
Mar 22 10:21:35 postfix1 postfix/smtpd[1815]: 7BB1E1020F56: client=localhost[127.0.0.1]
Mar 22 10:21:35 postfix1 postfix/cleanup[1804]: 7BB1E1020F56: message-id=<04be01cd0804$c85afcf0$5910f6d0$@test.com>
Mar 22 10:21:36 postfix1 postfix/qmgr[1551]: 7BB1E1020F56: from=<bulend@test.com>, size=6551, nrcpt=1 (queue active)
Mar 22 10:21:36 postfix1 amavis[1185]: (01185-03) Passed CLEAN, MYNETS/MYUSERS LOCAL [10.11.1.247] [10.11.1.247] <bulend@test.com> ->
<ymmaslak@hotmail.com>, Message-ID: <04be01cd0804$c85afcf0$5910f6d0$@test.com>, mail_id: cCPRWZ4UWdKi, Hits: -9.997, size: 5619, qu
eued_as: 7BB1E1020F56, 1233 ms
Mar 22 10:21:36 postfix1 postfix/smtp[1807]: 061561020F2D: to=<ymmaslak@hotmail.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=6.7, d
elays=4.3/1.1/0/1.3, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 7BB1E1020F56)
Mar 22 10:21:36 postfix1 postfix/qmgr[1551]: 061561020F2D: removed
Mar 22 10:21:36 postfix1 postfix/smtpd[1800]: disconnect from unknown[10.11.1.247]
Mar 22 10:21:36 postfix1 postfix/smtp[1819]: BF5241020F3A: to=<maslakbulend@gmail.com>, relay=gmail-smtp-in.l.google.com[173.194.70.2
6]:25, delay=2, delays=0.15/0.07/0.65/1.1, dsn=2.0.0, status=sent (250 2.0.0 OK 1332404496 u37si4339771weq.25)
Mar 22 10:21:36 postfix1 postfix/qmgr[1551]: BF5241020F3A: removed
Mar 22 10:21:37 postfix1 postfix/smtp[1825]: 7BB1E1020F56: to=<ymmaslak@hotmail.com>, relay=mx2.hotmail.com[65.55.92.152]:25, delay=
2.3, delays=1.1/0.01/0.47/0.74, dsn=2.0.0, status=sent (250 <04be01cd0804$c85afcf0$5910f6d0$@test.com> Queued mail for delivery)
Mar 22 10:21:37 postfix1 postfix/qmgr[1551]: 7BB1E1020F56: removed
Mar 22 10:22:16 postfix1 postfix/smtp[1818]: BB8EF1020F31: to=<maslak@test.com>, relay=mailhub2.test.com[213.238.128.252]:25
, delay=42, delays=0.16/0.07/36/4.9, dsn=2.0.0, status=sent (250 ok 1332404535 qp 88169)
Mar 22 10:22:16 postfix1 postfix/qmgr[1551]: BB8EF1020F31: removed
Mar 22 10:22:18 postfix1 postfix/smtp[1823]: 3F25E1020F55: to=<bulend@test.com>, relay=mailhub2.test.com[213.238.128.252]:25,
delay=43, delays=0.08/0.01/36/7, dsn=2.0.0, status=sent (250 ok 1332404537 qp 88172)
Mar 22 10:22:18 postfix1 postfix/qmgr[1551]: 3F25E1020F55: removed
Mar 22 10:22:18 postfix1 postfix/smtp[1822]: 3055B1020F4D: to=<bulend.maslak@test.com>, relay=mailhub2.test.com[213.238.128.2
52]:25, delay=44, delays=0.07/0.01/36/7.5, dsn=2.0.0, status=sent (250 ok 1332404537 qp 88171)
Mar 22 10:22:18 postfix1 postfix/qmgr[1551]: 3055B1020F4D: removed