https://mxtoolbox.com/ is a useful tool for doing this check; simply type blacklist:your_ip and you can check against all major spam blacklists.
From what I've heard and seen, DO, EC2, and Linode address blocks are more likely than not to be blacklisted by default. For transactional mail, you're much better off using something like Mailgun, Socketlabs, or Sendgrid. Some amount of marketing emails can also be sent through those services, but if you don't fit within the patterns they support, and if you're confident in taking control of your own mail reputation, you'll want to look at lesser-known VPS hosting companies whose IP blocks aren't blacklisted.
https://mxtoolbox.com/ is a useful tool for doing this check; simply type blacklist:your_ip and you can check against all major spam blacklists.
From what I've heard and seen, DO, EC2, and Linode address blocks are more likely than not to be blacklisted by default. For transactional mail, you're much better off using something like Mailgun, Socketlabs, or Sendgrid. Some amount of marketing emails can also be sent through those services, but if you don't fit within the patterns they support, and if you're confident in taking control of your own mail reputation, you'll want to look at lesser-known VPS hosting companies whose IP blocks aren't blacklisted.