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- iRedMail 版本号：0.9.6  + Ngix
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：Pro(LDAP)2.8.0
- 使用的 Linux/BSD 发行版名称及版本号：CentOS7.3
- 与您的问题相关的日志信息：
====

網域 Throttling 未設定管制

按照 http://www.iredmail.com/docs/change.mai … .size.html

winxp:
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Preferences]
"MaximumAttachmentSize"=dword:00000000

設定 100M , client 使用outlook2003 或 TB 或 outook Express , 附件為30多MB ,

會出現 "Undelivered Mail Returned to Sender"

退信內容:

This is the mail system at host mail.mydomain.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system /<test@mydomain.com>//: /host 127.0.0.1[127.0.0.1] said: 552 5.3.4 Message size (37536103 B) exceeds size limit (in reply to end of DATA command)

maillog:

Apr 19 10:36:43 mail postfix/submission/smtpd[2225]: connect from unknown[192.168.1.66]
Apr 19 10:36:43 mail opendmarc[1494]: ignoring connection from [192.168.1.66]
Apr 19 10:36:43 mail postfix/submission/smtpd[2225]: Anonymous TLS connection established from unknown[192.168.1.66]: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
Apr 19 10:36:44 mail postfix/submission/smtpd[2225]: 33894C001B520: client=unknown[192.168.1.66], sasl_method=PLAIN, sasl_username=aaa@mydomain.com
Apr 19 10:36:44 mail postfix/cleanup[2229]: 33894C001B520: message-id=<a4c1ef72-3fbf-c220-6a5d-f7711f3ef538@mydomain.com>
Apr 19 10:36:51 mail postfix/qmgr[1462]: 33894C001B520: from=<aaa@mydomain.com>, size=37536137, nrcpt=1 (queue active)
Apr 19 10:36:51 mail postfix/smtp-amavis/smtp[2230]: 33894C001B520: to=<test@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=7.4, delays=7.3/0.01/0/0.17, dsn=5.3.4, status=bounced (host 127.0.0.1[127.0.0.1] said: 552 5.3.4 Message size (37536103 B) exceeds size limit (in reply to end of DATA command))
Apr 19 10:36:51 mail postfix/cleanup[2229]: A1823C001B521: message-id=<20170419023651.A1823C001B521@mail.mydomain.com>
Apr 19 10:36:51 mail postfix/bounce[2231]: 33894C001B520: sender non-delivery notification: A1823C001B521
Apr 19 10:36:51 mail postfix/qmgr[1462]: A1823C001B521: from=<>, size=2676, nrcpt=1 (queue active)
Apr 19 10:36:51 mail postfix/qmgr[1462]: 33894C001B520: removed
Apr 19 10:36:51 mail postfix/pipe[2232]: A1823C001B521: to=<aaa@mydomain.com>, relay=dovecot, delay=0.18, delays=0.03/0.01/0/0.14, dsn=2.0.0, status=sent (delivered via dovecot service)
Apr 19 10:36:51 mail postfix/qmgr[1462]: A1823C001B521: removed
Apr 19 10:37:01 mail postfix/submission/smtpd[2225]: disconnect from unknown[192.168.1.66]

amavisd.log:

Apr 19 10:36:51 mail.domain.com /usr/sbin/amavisd[1843]: (01843-02) ESMTP REJECT: 552 5.3.4 Message size (37536103 B) exceeds size limit