·发件人(xxx@xxxxx.com)域名的DNS记录未设置或设置错误导致对方拒收此邮件。
host gmail-smtp-in.l.google.com[108.177.97.27] said: 550-5.7.26 This mail is unauthenticated, which poses a security risk to the sender and Gmail users, and has been blocked. The sender must authenticate with at least one of SPF or DKIM. For this message, DKIM checks did not pass and SPF check for [zmrobo.com] did not pass with ip: [43.154.221.58]. The sender should visit https://support.google.com/mail/answer/81126#authentication for instructions on setting up authentication. i3-20020a17090332c300b001b3dd62b1dbsi2791790plr.560 - gsmtp (in reply to end of DATA command)
解决方案 请通知你的邮箱管理员为邮箱域名设置正确的DNS(SPF、DKIM、DMARC)记录。详细请见 http://service.exmail.qq.com/cgi-bin/help?subtype=1&&no=1000580&&id=20012。
或https://open.work.weixin.qq.com/help2/pc/19820?person_id=1&subtype=1&no=1000580&id=20012

企业邮箱如何设置DMARC(TXT记录)
1、在设置DMARC记录之前,请务必确保已设置TXT记录(如何设置):
TXT记录值为:v=spf1 include:spf.mail.qq.com ~all
2、添加以下DMARC记录:
主机记录: _dmarc
记录类型:TXT
记录值: v=DMARC1; p=none; rua=mailto:mailauth-reports@qq.com

注:如不需要记录中rua,那么记录值为v=DMARC1; p=none;
DMARC记录标记如下:

如图:腾讯云域名的设置页面
(1)帐号登录 - DNSPod-免费智能DNS解析服务商-电信网通教育网,智能DNS,进入【域名解析】,点击域名,或者下方提醒

(2)进入添加记录页面,点击【添加记录】,记录类型选择TXT类型,然后根据DMARC记录要求填写主机记录、记录值到对应表格。其它保持默认。

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