Authentication Icon For Verified Email Senders.
Spammers can spoof an email to make it look like it’s sent by a real site or company that you might trust. To help protect you from such messages, Gmail tries to verify the real email sender using email authentication option. As an additional email security measure, you can enable the “Authentication icon for verified mail senders” lab.
How the lab works?
If you enable this lab feature, you will see a key icon next to authenticated emails from trusted mail senders, such as Google Wallet, eBay, and PayPal, who match the following standards:
- Sending a high volume of emails over time that most Google email users think are not spam.
Publish a DMARC discard policy, which means that the domain only sends authenticated emails and any unauthenticated email sent by the domain should be discarded.
Enable the lab feature
- On your computer, Sign in Gmail.
- In the top right corner, click email Settings.
- Click Settings tab > Labs.
- In the “Authentication icon for verified email senders” tab, Click to select Enable.
- At the bottom of the web page, click Save Changes button.