If you only change your email on your existing Facebook account, you will still be blocked. If you make a whole new Facebook account you won't be blocked.. Until you request him as a friend and he realizes it's you, and blocks you again..
Apparently this is normal on Facebook because the same thing happens to me. I think you will only see their posts in your newsfeed IF their posts are public - meaning you could have gone to their page at any time and seen them.
Your friend needs to contact Facebook (via the Facebook help pages) to report his account as being hacked so he can regain control of it.
Once he has control of his account, he can go into his privacy settings, and click "block lists" at the bottom - then UNblock you..
He can then re-add you, or you can re-friend him..
More information about text formats