Site Mailbox
The Site Mailbox app helps you keep email and documents close together by connecting your site to an Exchange mailbox. You can then view your email on SharePoint, and view site documents in Outlook.
SharePoint 2016
Feature Details
502a2d54-6102-4757-aaa0-a90586106368
Web
False
True
False
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\Template\Features\CollaborationMailbox
Microsoft.SharePoint.Portal.CollaborationMailboxFeatureReceiver, Microsoft.SharePoint.Portal, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c