==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：9.6
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：mysql
- 使用的 Linux/BSD 发行版名称及版本号：centos7
- 与您的问题相关的日志信息：
Apr 30 04:08:34 vm-mail postfix/smtpd[30852]: NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 <xx.org>: Helo command rejected: Host not found; from=<xxx@xxxx.org> to=<xx@xx.com> proto=ESMTP helo=<xx.org>
Apr 30 04:08:34 vm-mail postfix/smtpd[30852]: lost connection after RCPT from unknown[x.x.x.x]
Apr 30 04:08:34 vm-mail postfix/smtpd[30852]: disconnect from unknown[x.x.x.x]

Apr 30 06:25:55 vm-mail postfix/postscreen[31648]: DNSBL rank 5 for [x.x.x.x]:1154
Apr 30 06:25:55 vm-mail postfix/postscreen[31648]: NOQUEUE: reject: RCPT from [x.x.x.x]:1154: 550 5.7.1 Service unavailable; client [x.x.x.x] blocked using zen.spamhaus.org; from=<xx@x.com>, to=<x@xx.com>, proto=ESMTP, helo=<xx.com>
Apr 30 06:25:55 vm-mail postfix/postscreen[31648]: HANGUP after 0.12 from [x.x.x.x]:1154 in tests after SMTP handshake
Apr 30 06:25:55 vm-mail postfix/postscreen[31648]: DISCONNECT [x.x.x.x]:1154

Apr 30 06:49:52 vm-mail postfix/10025/smtpd[31751]: connect from vm-mail.poocan.com[127.0.0.1]
Apr 30 06:49:52 vm-mail postfix/10025/smtpd[31751]: D503C40CAB23: client=vm-mail.poocan.com[127.0.0.1]
Apr 30 06:49:52 vm-mail postfix/cleanup[31743]: D503C40CAB23: message-id=<f15e1047-8829-4b02-a208-52c785a4abf0@NWD2HUBCAS7.ad.analog.com>
Apr 30 06:49:52 vm-mail postfix/10025/smtpd[31751]: disconnect from vm-mail.poocan.com[127.0.0.1]
Apr 30 06:49:52 vm-mail postfix/qmgr[19073]: D503C40CAB23: from=<adimailer@analog.com>, size=25228, nrcpt=1 (queue active)
Apr 30 06:49:52 vm-mail amavis[25335]: (25335-13) Passed CLEAN {RelayedInbound}, [x.x.x.x]:21568 [x.x.x.x] <adimailer@analog.com> -> <xx@xx.com>, Queue-ID: 4F32140CAB22, Message-ID: <f15e1047-8829-4b02-a208-52c785a4abf0@nwd2hubcas7.ad.analog.com>, mail_id: jNXK0EY3_w8M, Hits: 1.229, size: 24525, queued_as: D503C40CAB23, 33814 ms, Tests: [DKIM_SIGNED=0.1,HTML_FONT_LOW_CONTRAST=0.001,HTML_IMAGE_RATIO_06=0.001,HTML_MESSAGE=0.001,MIME_HTML_ONLY=1.105,T_DKIM_INVALID=0.01,T_REMOTE_IMAGE=0.01,URIBL_BLOCKED=0.001]
Apr 30 06:49:52 vm-mail postfix/smtp-amavis/smtp[31748]: 4F32140CAB22: to=<xx@xx.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=40, delays=6/0.02/0.02/34, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as D503C40CAB23)
Apr 30 06:49:52 vm-mail postfix/qmgr[19073]: 4F32140CAB22: removed
====
这个用户的邮箱只能收不能发，但是其他的用户都可以收发邮件。请大神帮忙看下什么问题