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47451047 asked KaelYao-MSFT commented

Internet Send connectors in a high availability group

Hi.
I have 3 servers in DAG. How should I configure the Internet Send connectors on each server?


As far as I know, Exchange doesn't know how to route messages.

Do I have to do on each server 1 connector and add 2 other servers in this connector and so on on each server?

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AshokM-8240 answered KaelYao-MSFT commented

Hi,

Send connectors are Org-wide which are stored in AD and visible to all mailbox servers. You can create one send connector and add all 3 servers to that as the source servers to submit emails to the external recipients.

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https://docs.microsoft.com/en-us/exchange/mail-flow/connectors/send-connectors?view=exchserver-2019

If the above suggestion helps, please click on "Accept Answer" and upvote it.


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AshokM-8240, thank you !

I understand correctly that this is needed for load balancing?

But if some server fails to send the email, will it be in the queue? Since Exchange doesn't know anything about routing?

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Yes, adding multiple source servers to the send connectors can be considered as load balancing.

But if some server fails to send the email, will it be in the queue?

For this, please go through the transport pipeline to understand the flow. Mails will be picked/processed/submitted/routed by the Exchange Transport services. Each service is responsible for the actions.

https://docs.microsoft.com/en-us/exchange/mail-flow/mail-flow?view=exchserver-2019

Secondly, I'm trying the understand the point "Exchange doesn't know anything about routing"? Can you please elaborate more on what exactly you are looking for, which Exchange is unable to handle?






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Secondly, I'm trying the understand the point "Exchange doesn't know anything about routing"? Can you please elaborate more on what exactly you are looking for, which Exchange is unable to handle?

I have 3 servers.

1 server: connector to internet(source server ex1,ex2,ex3)
2 server: connector to internet(source server ex1,ex2,ex3)
3 server: connector to internet(source server ex1,ex2,ex3)

Will the message be sent randomly between servers?
What happens if I disable the send connector on server 2?
What happens if some server has problems with transport services?


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