1. 开启2FA 两步验证

https://www.google.com/landing/2step/

https://myaccount.google.com/signinoptions/two-step-verification

  1. 创建应用密码

https://security.google.com/settings/security/apppasswords

创建应用密码.gif

  1. 设置回复所使用的邮件地址

进入Gmail设置
Settings → Accounts → Send mail as

选择 Add another email address
此处添加你的Cloudflare Email Routing 里面的邮件地址

取消勾选Treat as an alias

然后选择Next Step

  1. 填入SMTP信息

SMTP Server: smtp.gmail.com Port: 587
Username: your gmail address (incl. @gmail.com)
Password is the App Password you generated in Step 2.
Leave TLS enabled
Click Add Account >>

设置好后会收到一封Gmail邮件 点击其中的链接确认 或按照其要求确认

  1. 更改Cloudflare Email Routing TXT Content内容

更改为v=spf1 include:_spf.google.com include:_spf.mx.cloudflare.net ~all

后续收到Cloudflare Email Routing 转发的邮件 回复时可以选择用刚刚你添加的那个邮件地址

可用于回复或者直发邮件 你的gmail地址会展示在代发信息中

参考

https://community.cloudflare.com/t/solved-how-to-use-gmail-smtp-to-send-from-an-email-address-which-uses-cloudflare-email-routing/382769/4