If you use EuropeanMX for both inbound and outbound email filtering (using the smart host setup), all external SMTP communication is automatically archived as part of the domain for which archiving is enabled. But Microsoft Exchange does not route internal communications through the outgoing smart host, so by default internal communications are not archived.
However, archiving internal communication is quite simple and can be done using the Exchange protocol system. The journaling system allows Exchange to automatically send a copy of all internal communications to an external email address. As long as you have set up the external email address with EuropeanMX for archiving, the EuropeanMX inbound filter will process the message and archive it. Configure the destination address to which the journaling reports are sent as a recipient in the whitelist. This means that there is no filtering for the received messages.
The global journal address can be found under Archiving > Status. Make sure that archiving is activated.
If the address ends with @MX-record-hostname, please use @mx1.europeanmx.eu instead.
Open Exchange Management Console EMC > Organization Configuration > Hub Transport > Journal Rules.
Right click and select New Journal Rule.
Enter the global journal address in Send Journal reports to e-mail address.
Select Internal Scope.
Select Journal messages for recipient and select the Dynamic Distribution Group for your domain.
Log into the Exchange Admin Center (EMC).
Go to Compliance Management > Journal rules.
Enter a valid email address to receive journal failure alerts.
Click on the plus sign (+) and create the journal rule as follows:
Log in to the Microsoft Purview portal.
Go to Solutions, then select Data lifecycle management on the left-hand side and click on Exchange (legacy).
Open the tab Journal rules.
If you have not set up an alternative mailbox for the messages that are not to be journalised, click on the link in the warning above to access the Settings. Now enter a mailbox as an alternative address that is not created in Exchange Online and to which the NDRs are to be delivered.
Now copy the global journal address, which you can find in EuropeanMX under Archiving > Status.
If the address ends with @MX-record-hostname, please use @mx1.europeanmx.eu instead.
Add a new rule in the tab Journal Rules of Exchange Online by using the button + New Rule.
Enter the following information:
If you use the incoming and outgoing spam filter of EuropeanMX, then you should only select Internal messages only. If not, you can select All messages.
Click on Next.
Check the journal rule again and then click on Submit.