That's odd. I had a single HDD vps for a few months, back when they offered those, and they immediately unblocked port 25 when I asked them via a support ticket. At the time I had expected more pushback about it, or clarifying questions. I kept using that same server for many years until they stopped offering that tier of server and force stopped it many years later.

The replacement vps I'm currently using still has the port blocked because I haven't felt the need to send email like that in quite a while.