Step 2: Create the Send Connector in Exchange 2013

Select Mail Flow > Send Connectors

Click + to add a new send connector

Enter Vaultastic in the Name field.

Select Custom as the Type option

Click Next

Under the Network settings, select Route mail to smart host

Click + to add a new smart host

Enter the FQDN (fully qualified domain name) of the Vaultastic server in the format o365-v4.vaultastic.com . Click Save

The new host will be listed under Smart Host in the New Send Connector Window. Click Next

For the Smart host authentication, select None option. Click Next.

Click + to add a new address space. Enter the FQDN as {domainprefix}.vaultastic.com server. Click Next.

Click + to select. In the pop-up dialog, select the source Exchange server, then click Add. Click OK.

Click Finish.