Login to the O365 Admin Console
Navigate Admin > Admin Centers > Exchange
Step 1
Under Mail Flow click Connector
Add (+) New Connector
Step 2
Select Mail Flow Scenario
From Partner Organization to Office 365
Step 3
Click Next
Name the connector
Click Next
Select Use the Sender’s Domain
Step 4
Click Next
Specify all connections using *
Step 5
Click Next
Leave the default TLS option in place
The Email Laundry will send over Opportunistic TLS
Check Reject Mail Messages if They Aren’t Sent from Within this IP Address Range
Click Add (+)
Add in The Email Laundry Delivery IP Ranges
**Please note The Email Laundry has region specific delivery ranges. They can be found in the customer set-up mail**
Click Next – Review your settings – Click Save