007 Unable to Verify Account Name or Password

问题描述：Mac 邮箱app添加Gmail账号后，能够收邮件，不能发邮件。

原因：Gmail 认为Mail是不够安全的应用，阻止了登录。

解决方法：

第一种方法直接打开Less secure app access

Google account > Security > Less secure app access

第二种方法，使用 App Passwords

If you use 2-Step-Verification and get a "password incorrect" error when you sign in, you can try to use an App Password.

1. Go to your Google Account.

2. Select Security.

3. Under "Signing in to Google," select App Passwords. You may need to sign in. If you don’t have this option, it might be because:

   1. 2-Step Verification is not set up for your account.
   2. 2-Step Verification is only set up for security keys.
   3. Your account is through work, school, or other organization.
   4. You turned on Advanced Protection.

4. At the bottom, choose Select app and choose the app you using [图片上传失败...(image-98e536-1601448861294)]

   Select device and choose the device you’re using [图片上传失败...(image-d9f450-1601448861294)]

   Generate.

5. Follow the instructions to enter the App Password. The App Password is the 16-character code in the yellow bar on your device.

6. Tap Done.

Tip: Most of the time, you’ll only have to enter an App Password once per app or device, so don’t worry about memorizing it.

直接打开allow less secure app