Microsoft Exchange 2016 - Receive Connector
Learn about Receive connectors in Exchange 2016, and how they control mail flow into your Exchange organization.
Exchange 2016 servers use Receive connectors to control inbound SMTP connections from:
Messaging servers that are external to the Exchange organization.
Services in the transport pipeline on the local Exchange server or on remote Exchange servers.
Email clients that need to use authenticated SMTP to send messages.
You can create Receive connectors in the Transport service on Mailbox servers, the Front End Transport service on Mailbox servers, and on Edge Transport servers. By default, the Receive connectors that are required for inbound mail flow are created automatically when you install an Exchange 2016 Mailbox server, and when you subscribe an Edge Transport server to your Exchange organization