On the Exchange server, create a mail contact. The mail contact is the external email address of the ContentStore Mailbox that will receive the journal reports.
The domain name must be a non-existent domain. You must use the same domain for the remote domain, the mail contact, the Send connector, and the journal rules.
Tip: Create only one mail contact so that you do not create duplicate journal reports.
Before You Begin
You must have a thorough understanding of journaling and of managing mail contacts on the Exchange server. Consult the Microsoft documentation before you create a mail contact. For example, see the article on the Microsoft TechNet site that corresponds with your version of Exchange.
Exchange 2016: "Manage mail contacts", https://technet.microsoft.com/en-us/library/mt577276(v=exchg.160).aspx
Exchange 2013: "Manage mail contacts", https://technet.microsoft.com/en-us/library/aa998858(v=exchg.150).aspx
Exchange 2010: "Create a Mail Contact", https://technet.microsoft.com/en-us/library/aa998858(v=exchg.141).aspx
Exchange 2007: "Managing Mail Contacts and Mail Users", https://technet.microsoft.com/en-us/library/aa997138(v=exchg.80).aspx
Procedure
In this example, you create a mail contact using Windows PowerShell for a contact named Journal1.
Start Windows PowerShell.
To create a mail contact for the ContentStore Mailbox, type the following command:
New-MailContact -Name "Journal1" -ExternalEmailAddress Journal1@domain.com -OrganizationalUnit Users
To hide the mail contact so that it does not appear the global address list, type the following command:
Set-MailContact -Identity "Journal1" -HiddenFromAddressListsEnabled $true
What to Do Next
On the Exchange server, create the Send connector.