1. Sign in to your Google Admin console.

    Sign in using an administrator account, not your current account saarusharma789@gmail.com

  2. In the Admin console, go to Menu ""and then"" Appsand thenGoogle Workspaceand thenGmail.
  3. Click Authenticate email.
  4. In the Selected domain menu, select the domain where you want to set up DKIM.
  5. Click the Generate New Record button.
  6. In the Generate new record box, select your DKIM key settings you can choose the DKIM key length 1024 or 2048.
SettingOptions
DKIM key bit length

2048—If your domain provider supports 2048-bit keys, select this option. Longer keys are more secure than shorter keys. If you previously used a 1024-bit key, you can switch to a 2048-bit key if your domain provider supports them. Read more about domain keys and TXT record limits.

1024—If your domain host doesn't support 2048-bit keys, select this option.
Prefix selector

The default selector prefix is google. We recommend you use the default.

If your domain already uses a DKIM key with the prefix google, enter a different prefix in this field. Read more about DKIM selectors.

7. At the bottom of the Generate new record box, click Generate. On the setting page, the text string beneath TXT record value changes to a new value and this message is displayed: DKIM authentication settings updated.

  1. Copy the DKIM values shown in the Authenticate email window. You’ll add it at your domain DNS.


Step 3: Turn on DKIM signing


  1. Sign in to your Google Admin console.

    Sign in using an administrator account.

  2. In the Admin console, go to Menu ""and then"" Appsand thenGoogle Workspaceand thenGmail.
  3. Click Authenticate email.
  4. In the Selected domain menu, select the domain where you want to turn on DKIM. 
  5. Click the Start authentication button. When DKIM setup is complete and working correctly, the status at the top of the page changes to: Authenticating email with DKIM.