Unlike other function of Pipedrive, the visibility of emails is controlled by users, not by Admin Users.
Each user’s inbox is always private — as personal emails can be synced into Pipedrive — meaning that each user is responsible for the contents of their Mail tab, and that information cannot be adjusted by any other user in the account.
If you wish to share email conversations that are linked to a deal or contact, this can be done as a global setting, or on a case-by-case basis.
The default setting for Pipedrive — found under Settings > Customize > Personal > Connections > Email integration — is that all emails linked to an item are shared on that item page. This makes each linked email visible to any user that has the ability to see that deal or contact.
If this default email sharing setting is adjusted, it will only affect future emails arriving into the Pipedrive user account.
The email visibility of any emails currently in the Pipedrive account can be adjusted by that email's owner from within the Mail tab of their Pipedrive user account.
Those emails will appear in the Inbox of the user’s Mail tab, marked with a blue Shared icon if shared with other users in the Pipedrive account.
An email marked as Shared will appear in the Detail View of its associated item, and will be visible to any user who has permission to see that item.
For more information about the Email integration's functions and what they do, click here.