Definition
Filter for profiles based on whether at least one email address for the profile has the specified value for Usability. This attribute should help you define Communities for Email outreach. You may want to only Email profiles with usable email addresses. Usability values include: Unknown, Usable, Hostile, National Do Not Use, Requested Do Not Use, Inactive Disconnected, Other Unusable, and Unreliable Information.
Location
Contact > Email Address