All publishers accept submissions. They don’t dare not to. They have to look. (They don’t want to miss the next Harry Potter.) Check out Dean Wesley Smith’s blog, Killing The Sacred Cows of Publishing. Start with this one, but look at the TOC as well. Good luck!
Yes, this is from her 2012 post on The Business Rusch: The Agent Clause (Deal Breakers 2012).
Check it out if you're writing. In fact, read as much of The Business Rusch as possible. It will help you understand current publishing, the past of book publishing, and a great deal more. I cannot tell you enough; just go.
In fact, here's her latest, The Business Rusch: Unintended Consequences. Her blog posts on Thursdays.