This extension to Chrome allows you to identify the email service provider that delivered the email messages to your Gmail account, that company will be providing the tracking of your email to the company or brand that sent the message.

When you open an email the extension checks to see if the message was sent using the infrastructure of one of a number of known email providers. 

You can now easily identify if the email messages was sent from Mailchimp, Campaignmonitor or Salesforce for example.

When sending infrastructure has been identified an icon appears next to the subject line. Clicking that will take you to more information about the send service that delivered the email. Links to their website, their privacy policies and anti-spam policies. We also provide email contacts for the service provider themselves so you can contact directly if you need to make a complaint.

You are also able to leave public feedback about the vendor based on the types of message you have seen from them, directly on the SenderIntelligence website.