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Step 1. Select 'Customised Mailbox Api API Interface' in the gateway configuration option
Step 2. Select 'Add Mailbox Services'
Step 3. Fill in the necessary information (these information can be retrieved from the respective mailbox service provider)
Remarks：
In the event where the mailbox service provider require you to make changes to the DNS, MX Records please send us a screenshot together with the actual parameters
There are 2 option to proceed:
1. Let us know what MX record or DNS you need us to help add on cloudfare
2. Provide us the login details on G Suite (you can change the password when we are done)