smarthost Exchange 2016

Copper Contributor

in the following scenario: DAG 2 Exchange server 2016 as smart host on external mailserver ( all mailboxes regularly belong to users of the domain, except one which is consulted only on the external mailserver ( and the user does not have a mailbox in the DAG.

if I send an email from an external domain (for example to the disconnected mailbox AND to another regular mailbox , it arrives duplicated, from the external SMTP and from the internal one. How can I solve the problem?

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