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That link is useless. The admin answered and hasn’t revisited his decision in 4 years despite numerous people pointing out that his decision his in violation of the RFCs.
I want to use DO as an IPv6 capable mail server. It seems like the admin decision means I can’t do this. I will eventually be moving off of DO because of this. And I will stop recommending it to anybody else.
At this time, we are allocating 16 addresses to each droplet. In the future, we may consider raising the amount. To provide feedback and request more IP addresses, please let us know your thoughts on our uservoice page