No VPS has a shared IP address. The real problem is that the pool may have been dirtied by previous customers. But once you get a clean IP you can keep it for as long as you keep the service running.
I sent emails from a VPS for years without issues. I stopped purely because Fastmail had better software and cheaper storage.
I sent emails from a VPS for years without issues. I stopped purely because Fastmail had better software and cheaper storage.