I finally received access to the email routing part.
it has good advantages:
- Security usage: This allows you to hide server IP in single server businesses, that should have email service and web service in a single server
- You can route unmanaged email names to a single address to manage them.
But one improvement is needed I guess:
- Send emails: we should have our own SPF txt record to send emails as confirmed email servers. this seems to have a conflict with SPF that the system needs to use routing emails. (it says to remove your own SPF)