I just started to learn or experiment linux server and I found that vultr's price are acceptable. And I was gonna tell my classmates about vultr next monday. But now I just changed my mind.
I'm having an issue about smtp 25. They removed the default block. And I still face some issues that I have no idea. They told me that I have to verify the instance's local firewall allows connections via TCP 25. Then I moved to firewall page. I tried to created it based on what Ive been told. When I really couldn't figure out what the source is gonna be and I sent another ticket to ask what the source field is gonna be. And I got the response "We're a self-managed service; therefore, the installation, configuration and maintenance of software on your instance is out of the scope of our support". I totally understand it.
So if you are a newbie don't choose vultr