If multiple people are sending emails from their Gmail accounts in the same Google Chrome browser, HubSpot Sales will automatically track that email send in the HubSpot Sales account that is logged in.
This may cause you to begin getting notifications for emails that you never sent or do not recognize.
You can combat this in three different ways:
Have whoever is sending emails from your computer uncheck the HubSpot Sales checkbox to avoid tracking their emails
Go to your HubSpot Sales email settings or by clicking here and choose to only track emails from your addresses
Create a separate Chrome Profile for each individual that uses the computer. Learn how to do this here.