I was a happy Vultr customer until the day I tried to get port 25 unblocked. Instead of getting it unblocked I received a ”sorry not sorry” copy paste from some senior sales guy. I had spent thousands of dollars on their services running my servers for years. Needless to say I immediately dumped them, moved to Hetzner and 1 week later I had my own mail server running(still do).
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.