==== Required information ====
- iRedMail version: 0.6.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): 20
- Linux/BSD distribution name and version: Redhat 5
- Related log if you're reporting an issue:
====
maillog中大量的发送垃圾邮件信息，从其中一个内部帐号，但该帐号已经被删除。只要启动postfix服务，就能在maillog中不停的看到如下信息：

ug 31 16:10:34 *** postfix/qmgr[6210]: AF13A31137B: from=<support@***.cn>, size=2338, nrcpt=50 (queue active)
Aug 31 16:10:34 *** postfix/qmgr[6210]: CA1D331368D: from=<support@***.cn>, size=3057, nrcpt=44 (queue active)
Aug 31 08:10:34 *** policyd: rcpt=1389, greylist=abuse, host=65.55.111.176 (unknown), from=<>, to=support@***.cn, size=5696
Aug 31 16:10:34 *** postfix/smtpd[6453]: NOQUEUE: reject: RCPT from unknown[65.55.111.176]: 450 4.7.1 <support@***.cn>: Recipient address rejected: Policy Rejection- Please try later.; from=<> to=<support@***.cn> proto=ESMTP helo=<blu0-omc4-s37.blu0.hotmail.com>
Aug 31 16:10:34 *** postfix/qmgr[6210]: A12A8321160: from=<support@***.cn>, size=3802, nrcpt=48 (queue active)
Aug 31 16:10:34 *** postfix/qmgr[6210]: 24D333400F2: from=<support@***.cn>, size=4231, nrcpt=50 (queue active)
Aug 31 16:10:34 *** postfix/error[6353]: C19B2340BD6: to=<rar65932@aol.com>, relay=none, delay=52037, delays=52008/27/0/1.1, dsn=4.0.0, status=deferred (delivery temporarily suspended: host mailin-04.mx.aol.com[205.188.146.194] refused to talk to me: 554- (RTR:SC)  http://postmaster.info.aol.com/errors/554rtrsc.html 554  Connecting IP: 211.147.230.147)
Aug 31 16:10:34 *** postfix/error[6303]: C160133F302: to=<r_ittenbach@yahoo.com>, relay=none, delay=69224, delays=69195/28/0/1.3, dsn=4.7.0, status=deferred (delivery temporarily suspended: host mta7.am0.yahoodns.net[66.94.238.147] refused to talk to me: 421 4.7.0 [TS01] Messages from 211.147.230.147 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
Aug 31 16:10:34 *** postfix/error[6498]: 784F19AD035: to=<enlighteningcenter@yahoo.com>, relay=none, delay=27259, delays=27230/27/0/1.6, dsn=4.7.0, status=deferred (delivery temporarily suspended: host mta7.am0.yahoodns.net[66.94.238.147] refused to talk to me: 421 4.7.0 [TS01] Messages from 211.147.230.147 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
Aug 31 16:10:34 *** postfix/error[6355]: A8A84311C35: to=<dealbj2u@yahoo.com>, relay=none, delay=31112, delays=31083/27/0/2.5, dsn=4.7.0, status=deferred (delivery temporarily suspended: host mta7.am0.yahoodns.net[66.94.238.147] refused to talk to me: 421 4.7.0 [TS01] Messages from 211.147.230.147 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
Aug 31 16:10:34 *** postfix/error[6274]: 5F1DB34309A: to=<bobied28@aol.com>, relay=none, delay=38144, delays=38116/28/0/0.44, dsn=4.0.0, status=deferred (delivery temporarily suspended: host mailin-04.mx.aol.com[205.188.146.194] refused to talk to me: 554- (RTR:SC)  http://postmaster.info.aol.com/errors/554rtrsc.html 554  Connecting IP: 211.147.230.147)
Aug 31 16:10:34 *** postfix/error[6284]: C10B59A7415: to=<lucylui2@yahoo.com>, relay=none, delay=71427, delays=71398/28/0/1.4, dsn=4.7.0, status=deferred (delivery temporarily suspended: host mta7.am0.yahoodns.net[66.94.238.147] refused to talk to me: 421 4.7.0 [TS01] Messages from 211.147.230.147 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
Aug 31 16:10:34 *** postfix/error[6384]: C794C322CD5: to=<qbl1032@aol.com>, relay=none, delay=69322, delays=69293/28/0/0.93, dsn=4.0.0, status=deferred (delivery temporarily suspended: host mailin-04.mx.aol.com[205.188.146.194] refused to talk to me: 554- (RTR:SC)  http://postmaster.info.aol.com/errors/554rtrsc.html 554  Connecting IP: 211.147.230.147)
Aug 31 16:10:34 *** postfix/error[6297]: A26AA321F88: to=<d_duck@eudoramail.com>, relay=none, delay=91137, delays=91107/30/0/0.06, dsn=4.7.1, status=deferred (delivery temporarily suspended: host mx.lycos.com.cust.b.hostedemail.com[64.98.36.4] refused to talk to me: 554 5.7.1 Service unavailable; Client host [211.147.230.147] blocked using urbl.hostedemail.com; http://psbl.surriel.com/listing?ip=211. … ist+query)

请问，要如何才能让系统不再通过这个帐号发送垃圾邮件？？

谢谢！！