few month ago a user account started with alot of activity at the mail server, every day we have to go to queue-active option and delete the mails from this user because if not the server will fail. the scenario is as follos:

the user has his account at zimbra mail server, every email is been fwd to another account (different domain, personal account of the user). few month ago we detected that every day this user has at least 90 mails in the queue list permanently, we delete the account without any success, we rename the account and the problem persisted, below you can find the log file showing this activity,

the question is what is the problem? and most important if someone could help me to solve it. thank you in advance for you support

br
Mario




root@mail:~# tail -f /var/log/mail.log |grep USER*
Jan 3 13:15:48 mail postfix/qmgr[11095]: D02B13E0082: from=<USER@DOMAIN1.com>, size=191499, nrcpt=1 (queue active)
Jan 3 13:15:48 mail postfix/smtp[30661]: C207E3E012D: to=<USER@DOMAIN2.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=38, delay=20, delays=0.64/14/0/5.4, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=26755-01-38, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as D02B13E0082)
Jan 3 13:15:49 mail postfix/qmgr[11095]: 904883E012D: from=<USER@DOMAIN1.com>, size=5039, nrcpt=1 (queue active)
Jan 3 13:15:49 mail postfix/smtp[31055]: 256903E00C0: to=<USER@DOMAIN2.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=19, delay=19, delays=0.04/18/0/1.4, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=30152-01-19, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 904883E012D)
Jan 3 13:15:49 mail postfix/lmtp[23148]: 523073E014B: to=<USER@DOMAIN1.com>, relay=mail.DOMAIN.com[172.16.210.101]:7025, delay=1.9, delays=0.48/0/0/1.4, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 3 13:15:49 mail postfix/qmgr[11095]: A75513E03B9: from=<USER@DOMAIN1.com>, size=9010, nrcpt=1 (queue active)
Jan 3 13:15:49 mail postfix/qmgr[11095]: 852B53E021E: from=<USER@DOMAIN1.com>, size=147731, nrcpt=1 (queue active)
Jan 3 13:15:49 mail postfix/smtp[29481]: 6BAE33E0238: to=<USER@DOMAIN2.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=10, delay=26, delays=0.25/13/0/13, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=30431-02-10, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as A75513E03B9)
Jan 3 13:15:50 mail postfix/smtp[30446]: 5C0D23E0138: to=<USER@DOMAIN1.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=11, delay=31, delays=3.2/13/0/15, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=30443-01-11, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 4013A3E00C0)
Jan 3 13:15:50 mail postfix/qmgr[11095]: 522863E0138: from=<USER@DOMAIN1.com>, size=92200, nrcpt=1 (queue active)
Jan 3 13:15:50 mail postfix/lmtp[24365]: 4013A3E00C0: to=<USER@DOMAIN1.com>, relay=mail.DOMAIN.com[172.16.210.101]:7025, delay=1.2, delays=0.82/0.04/0/0.32, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 3 13:15:50 mail postfix/smtp[30787]: 7EA5285A029: to=<USER@DOMAIN1.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=30, delays=3.8/12/0.01/14, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=30996-01, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 7AF463E00C0)
Jan 3 13:15:51 mail postfix/qmgr[11095]: EE24E3E0238: from=<USER@DOMAIN1.com>, size=100345, nrcpt=1 (queue active)
Jan 3 13:15:51 mail postfix/smtp[30445]: B480A3E00AB: to=<USER@DOMAIN2.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=54, delay=23, delays=0.88/15/0.02/7.1, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=26602-01-54, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as EE24E3E0238)
Jan 3 13:15:51 mail postfix/qmgr[11095]: 7AC5685A016: from=<USER@DOMAIN1.com>, size=36542, nrcpt=1 (queue active)
Jan 3 13:15:51 mail postfix/lmtp[24367]: 7AF463E00C0: to=<USER@DOMAIN1.com>, relay=mail.DOMAIN.com[172.16.210.101]:7025, delay=1.1, delays=0.38/0.08/0.02/0.63, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 3 13:15:51 mail postfix/smtp[18168]: 4BA2E3E0178: to=<USER@DOMAIN2.com>, relay=ti.com.s9a1.psmtp.com[74.125.148.10]:25, delay=10, delays=0.54/0.14/2.9/6.7, dsn=2.0.0, status=sent (250 Thanks)
Jan 3 13:15:52 mail postfix/smtp[29948]: E11EF3E02B2: to=<USER@DOMAIN1.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=20, delay=27, delays=4.6/15/0.03/7, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=30391-01-20, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 98FCD3E00AB)
Jan 3 13:15:52 mail postfix/smtp[30600]: 861EE3E0255: to=<USER@DOMAIN1.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=48, delay=28, delays=5/17/0/6.1, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=26568-01-48, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 40FF03E0178)
Jan 3 13:15:52 mail postfix/qmgr[11095]: 3D4553E00C0: from=<USER@DOMAIN1.com>, size=155704, nrcpt=1 (queue active)
Jan 3 13:15:52 mail postfix/lmtp[24277]: 98FCD3E00AB: to=<USER@DOMAIN1.com>, relay=mail.DOMAIN.com[172.16.210.101]:7025, delay=1.3, delays=0.44/0.01/0/0.8, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 3 13:15:53 mail postfix/smtp[16724]: A71BC3E016D: to=<USER@DOMAIN2.com>, relay=ti.com.s9a1.psmtp.com[74.125.148.10]:25, delay=9.7, delays=0.5/0.03/3.1/6.1, dsn=2.0.0, status=sent (250 Thanks)
Jan 3 13:15:53 mail postfix/smtp[30383]: 7E4B185A019: to=<USER@DOMAIN1.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=33, delays=9.3/17/0.02/6.2, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=31349-01, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as EE48B85A017)
Jan 3 13:15:53 mail postfix/qmgr[11095]: 7988985A01A: from=<USER@DOMAIN1.com>, size=171516, nrcpt=1 (queue active)
Jan 3 13:15:53 mail postfix/lmtp[24268]: 40FF03E0178: to=<USER@DOMAIN1.com>, relay=mail.DOMAIN.com[172.16.210.101]:7025, delay=1.4, delays=0.62/0/0.01/0.76, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 3 13:15:54 mail postfix/qmgr[11095]: E2F6C3E0089: from=<USER@DOMAIN1.com>, size=187582, nrcpt=1 (queue active)
Jan 3 13:15:54 mail postfix/qmgr[11095]: DC21B85A01B: from=<USER@DOMAIN1.com>, size=203718, nrcpt=1 (queue active)
Jan 3 13:15:54 mail postfix/lmtp[23148]: EE48B85A017: to=<USER@DOMAIN1.com>, relay=mail.DOMAIN.com[172.16.210.101]:7025, delay=1.2, delays=0.67/0/0.02/0.5, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 3 13:15:54 mail postfix/smtp[30446]: 5C7BC3E0225: to=<USER@DOMAIN2.com>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=12, delay=23, delays=0.17/19/0/4.1, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=30443-01-12, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as DC21B85A01B)
Jan 3 13:15:54 mail postfix/smtp[26088]: A75513E03B9: to=<USER@DOMAIN2.com>, relay=ti.com.s9a1.psmtp.com[74.125.148.10]:25, delay=5.9, delays=0.51/0.02/3.3/2.1, dsn=2.0.0, status=sent (250 Thanks)