Hi @aboppart
By default, HubSpot logs and tracks every email that you send once you connect your Outlook. If your Outlook has stored email addresses that it “knows”, but HubSpot doesn’t recognize them, HubSpot will then create a new contact based on the email address - which is, the “license plate” or unique identifier in HubSpot.
There are a few things you can do:
1. Adjust your extension log and track settings that allow you to decide which emails should be logged and tracked. This video explains how to do this.
2. Add specific domains that you will never log, like your internal company domain. To do this, go to Settings (the gear icon, top right) then click Integrations in the side left column. Next, click Email integrations and select the 3rd tab labeled Log and Track. In the Never Log enter the domains and email addresses you would like to have blocked.
Be sure to select whether you would like these addresses to be blocked for only you or for everyone that is a user in your HubSpot portal.
I hope this helps. If it does, please mark it as a solution to help others in the community.
Thank you.
-Will