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mailchimp is not intended for transnational mail anyway, it is intended for newsletter which are a different thing.
looks like the domain is parked, probably becuase they failed to renue it.
Is there a need for such animosity?
Using a a web application to do server management is the tail wagging the dog.
Just becuase some framworks do doesn't mean it it should be copied.
Vanilla is called Vanilla for a reason. It is not called Tuti Fruti.
Vanilla is extensible, you can develop it yourself.