Send connectors created automatically by the Edge Subscription

Send connectors created automatically by the Edge Subscription

Edge Subscription creates the following Send connectors:

  • A Send connector named EdgeSync – Inbound to <Site Name> that’s configured to relay messages from the Edge Transport server to the Exchange organization.
  • A Send connector named EdgeSync – <Site Name> to Internet that’s configured to relay messages from the Exchange organization to the Internet.

Also, subscribing an Edge Transport server to the Exchange organization allows the mailbox servers in the subscribed Active Directory site to use the invisible and implicit intra-organization Send connector to relay messages to the Edge Transport server.

Inbound Send connector to receive messages from the Internet

When you run the New-EdgeSubscription cmdlet on the mailbox server, the CreateInboundSendConnector parameter is set to the value $true. This creates the Send connector needed to send messages from the Edge Transport server to the Exchange organization. The settings for this Send connector are automatically configured as follows:

PropertyValue
NameEdgeSync – Inbound to <Site Name>
AddressSpacesSMTP:–;1
The — value in the address space represents all authoritative and internal relay accepted domains for the Exchange organization. Any messages the Edge Transport server receives for these accepted domains are routed to this Send connector and relayed to the smart hosts.
SourceTransportServers<Edge Subscription name>
EnabledTrue
DNSRoutingEnabledFalse
SmartHosts
The — value in the list of smart hosts represents all mailbox servers in the subscribed Active Directory site. Any mailbox servers you add to the subscribed Active Directory site after you establish the Edge Subscription don’t participate in the EdgeSync synchronization process. However, they are automatically added to the list of smart hosts for the automatically created inbound Send connector. If more than one mailbox server is located in the subscribed Active Directory site, inbound connections will be load balanced across the smart hosts.

You can’t modify the address space or list of smart hosts at creation time for the automatically created inbound Send connector. However, you can set the CreateInboundSendConnector parameter to the value $false when you create an Edge Subscription. This allows you to manually configure a Send connector from the Edge Transport server to the Exchange organization.

Outbound Send connector to send messages to the Internet

When you run the New-EdgeSubscription cmdlet on the mailbox server, the CreateInternetSendConnector parameter is set to the value $true. This creates the Send connector needed to send messages from the Exchange organization to the Internet. The settings for this Send connector are automatically configured as follows:

PropertyValue
NameEdgeSync – <Site Name> to Internet
AddressSpacesSMTP:*;100
SourceTransportServers<Edge Subscription name>. The name of the Edge Subscription is the same as the name of the subscribed Edge Transport server.
EnabledTrue
DNSRoutingEnabledTrue
DomainSecureEnabledTrue

If more than one Edge Transport server is subscribed to the same Active Directory site, no additional Send connectors to the Internet are created. Instead, all Edge Subscriptions are added to the same Send connector as the source server. This load balances outbound connections to the Internet across the subscribed Edge Transport servers.

The outbound Send connector is configured to send email messages from the Exchange organization to all remote SMTP domains, using DNS routing to resolve domain names to MX resource records.

 

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