Microsoft Exchange smart host or Send connector settings

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It might be required to send outgoing emails to a particular domain (or all outgoing emails) via a SMTP Gateway / Smart host or Send connector. To configure the same (or view existing configuration) use:

1. Login into exchange admin center via Web UI
2. Go to "Mail Flow" -> "Send connectors"
3. Here we can either create a new send connector with parameters such as:

   • Name to identify connector
   • IP address or FQDN of Smart Host (SMTP Gateway)
   • Define authentication details for SMTP Gateway, if required
   • Address space. This can be * for generic smart host for all domains
   • Source server - Select one or more exchange servers that will be used to initiate connection to Smart host.

Refer:

• https://learn.microsoft.com/en-us/exchange/mail-flow/connectors/outbound-smart-host-routing?view=exchserver-2019

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