Activity History is a standard object in Salesforce found under both Leads and Contacts. When sending an email through VerticalResponse the Activity History will be updated under the following circumstances:
If both of these conditions are met then the Activity History for the Leads and Contacts will record that the email was sent through VerticalResponse. Please note that the Activity History will not show any information on clicks, opens, bounces or unsubscribes. You will find this information for your individual Leads and Contacts within the VR Email History objects.