向Gmail邮箱发信常见退信说明
退信示例发件人： postmaster@magicwinmail.com
发送时间： 2014-09-06 11:20:06
收件人： demo@magicwinmail.com
抄送：
主题： failure notice（错误回弹信）
Hi. This is the smtp delivery program.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
=====================================================
您好！
您的邮件不能成功的递送到指定地址。这是一个永久的错误，因此不得不放弃继续递送。
<winmaildemo@gmail.com>, remote server said: 550-5.7.1 Our system has detected that this message is
550-5.7.1_likely_unsolicited mail. To reduce the amount of spam sent to Gmail,
550-5.7.1 this message has been blocked. Please visit
550-5.7.1 http://support.google.com/mail/bin/answer.py?hl=en&answer=188131 for
550 5.7.1 more information. mu18si1139639pab.287 - gsmtp/
--- Below this line is a copy of the message.
Received: from hp-spring ()
(envelope-sender <demo@magicwinmail.com>)
by 192.168.1.4 with ESMTP
for <minahan@amaxit.net>; Sat, 06 Sep 2014 11:20:00 +0800
Date: Sat, 6 Sep 2014 11:20:55 +0800
From: "demo" <demo@magicwinmail.com>
Reply-To: demo@magicwinmail.com
To: "=?gb2312?B?1IrI4w==?=" <hr@amaxit.net>
Cc: "cathy tsai" <winmaildemo@gmail.com>,
"agnes.fu" <agnsfu@magicwinmail.com>
Subject: KET sample question to ask in order to prepare the samples
Message-ID: <201409061120555008262@magicwinmail.com>
退信原因：Gmail认为此邮件为垃圾邮件。
处理建议：如果邮件中包含可疑或垃圾文本，或者邮件的发件人 IP 具有发送非请求邮件的历史记录，则该邮件可能会被阻止。可能会阻止一小部分很有可能是垃圾邮件的邮件，但并非阻止您的所有邮件。但是，为了帮助您提高邮件的送达率，我们建议您参阅群发邮件发件人指南。
Gmail的其他常见退信代码说明：
[*]552-5.7.0 This message was blocked because its content presents a potential
552-5.7.0 security issue. Please visit http://support.google.com/mail/bin/answe
552-5.7.0 r.py?answer=6590 to review our message content and attachment content
552 5.7.0 guidelines. tk9si9998068pac.416 - gsmtp
退信原因：作为防御潜在病毒的一项安全措施，Gmail 不允许您发送或接受可执行文件（如带有 .exe 后缀名的文件）。可执行文件可能包含有害代码，从而可能导致将恶意软件下载至您的计算机上。此外，Gmail 也不允许发送或接收破坏的文件、无法正常工作的文件。
处理建议：检查外发邮件的附件是否正常。以下附件不可发送：（压缩后也不行）
.ade、.adp、.bat、.chm、.cmd、.com、.cpl、.exe、.hta、.ins、.isp、.jse、.lib、.lnk、.mde、.msc、.msp、.mst、.pif、.scr、.sct、.shb、.sys、.vb、.vbe、.vbs、vxd、.wsc、.wsf、.wsh
无法发送内含压缩文件的密码保护压缩文件。如有可能，请解压缩所有文件或去掉密码保护。
您所发送和接收的邮件总大小（包括附件）不得超过 25 兆字节 (MB)
如果要了解具体情况请到https://support.google.com/mail/answer/6590查看说明。
[*]550 5.2.1 The email account that you tried to reach is disabled. u8si12721870pbf.252
退信原因：收件人的邮箱状态冻结。
处理建议：联系收件人确认其邮箱状态正常。
[*]550-5.2.1 The user you are trying to contact is receiving mail at a rate that
550-5.2.1 prevents additional messages from being delivered. For more
550-5.2.1 information, please visit
550 5.2.1 http://mail.google.com/support/bin/answer.py?answer=6592 qm4si36139485igc.67
退信原因：您试图联系的 Gmail 用户在短时间内收到了太多邮件。
处理建议：请注意，这是暂时性问题，应该很快就会解决。可以等待一段时间再重试发送
[*]550-5.7.1 Our system has detected an unusual rate of
550-5.7.1 unsolicited mail originating from your IP address. To protect our
550-5.7.1 users from spam, mail sent from your IP address has been blocked.
550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review
550 5.7.1 our Bulk Email Senders Guidelines. hl10si435917vdb.117 - gsmtp)
退信原因：Gmail认为此邮件为大量群发邮件。可能是广告、推广、会员等类型邮件。
处理建议：注意向Gmail发信的频率，对方有频率要求，超过频率将无法发信给Gmail。注意外发邮件内容，并且给服务器做好相关的正确的MX记录，IP反向解析，SPF记录，如果要了解Gmail的相关群发说明，可以到https://support.google.com/mail/answer/81126查看。
[*]550-5.7.1 Our system has detected that this message is
550-5.7.1 not RFC 2822 compliant. To reduce the amount of spam sent to Gmail,
550-5.7.1 this message has been blocked. Please review
550 5.7.1 RFC 2822 specifications for more information. je1si14935522pbb.180 - gsmtp)
退信原因：邮件内容不符合RFC 2822 标准。
处理建议：检查邮件源码，发送的邮件不符合相关的RFC标准。也有可能是邮件内容本身敏感词，检查内容重新发送。
[*]421-4.7.0 Our system has detected an unusual rate of
421-4.7.0 unsolicited mail originating from your IP address. To protect our
421-4.7.0 users from spam, mail sent from your IP address has been temporarily
421-4.7.0 rate limited. Please visit
421-4.7.0 http://www.google.com/mail/help/bulk_mail.html to review our Bulk
421 4.7.0 Email Senders Guidelines. om6si16848085wjc.30 - gsmtp
退信原因：Gmail认为此邮件为大量群发邮件。可能是广告、推广、会员等类型邮件。
处理建议：注意向Gmail发信的频率，对方有频率要求，超过频率将无法发信给Gmail。注意外发邮件内容，并且给服务器做好相关的正确的MX记录，IP反向解析，SPF记录，如果要了解Gmail的相关群发说明，可以到https://support.google.com/mail/answer/81126查看。
[*]550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 http://support.google.com/mail/bin/answer.py?answer=6596 hk7si5975086wjc.23 - gsmtp
退信原因：收件人邮箱地址不存在。
处理建议：检查收件人地址是否正确，联系对方确认地址正常。如果您确定不存在错误，则相应Gmail地址可能已被禁用、删除或者根本不存在。
[*]550-5.7.1 Our system has detected that this
550-5.7.1 message does not meet IPv6 sending guidelines regarding PTR records
550-5.7.1 and authentication. Please review
550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error for more
550 5.7.1 information. bz2si13656083wjc.108 - gsmtp
退信原因：发件人设置不正规。
处理建议：没有设置相关IP反向解析，SPF记录，可以先做好相关记录再外发。具体可以查看https://support.google.com/mail/?p=ipv6_authentication_error说明。
学习了，谢谢
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