host gmail-smtp-in.l.google.com[74.125.137.26] said: 552-5.7.0 This message was blocked because its content presents a potential 552-5.7.0 security issue. Please visit 552-5.7.0 File types blocked in Gmail to review our 552 5.7.0 message content and attachment content guidelines. 18si1777504pfy.345 - gsmtp (in reply to end of DATA command)退信代码：552-5.7.0Gmail 常见退信代码说明 552-5.7.0 This message was blocked because its content presents a potential552-5.7.0 security issue. Please visit http://support.google.com/mail/bin/answe552-5.7.0 r.py?answer=6590 to review our message content and attachment content552 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 that550-5.2.1 prevents additional messages from being delivered. For more550-5.2.1 information, please visit550 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 [183.63.134.158 3] Our system has detected an unusual rate of550-5.7.1 unsolicited mail originating from your IP address. To protect our550-5.7.1 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 review550 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。421-4.7.0 [113.106.33.234 15] Our system has detected an unusual rate of421-4.7.0 unsolicited mail originating from your IP address. To protect our421-4.7.0 users from spam, mail sent from your IP address has been temporarily421-4.7.0 rate limited. Please visit421-4.7.0 http://www.google.com/mail/help/bulk_mail.html to review our Bulk421 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 try550-5.1.1 double-checking the recipient*s email address for typos or550-5.1.1 unnecessary spaces. Learn more at550 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 [2001:db8:8e3f:43c7::12 16] Our system has detected that this550-5.7.1 message does not meet IPv6 sending guidelines regarding PTR records550-5.7.1 and authentication. Please review550-5.7.1https://support.google.com/mail/?p=ipv6_authentication_errorfor more550 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。}