I don't believe any Obama e-mails have ever been released.  The only Clinton e-mails that have been released were those released by the State Department through freedom of information requests.  You may be thinking of the hacked DNC and Podesta e-mails which dealt with campaign matters and had no national security secrets in them.  Oh, I'm sorry! - this is the Trump era now.  Please don't let facts stand in the way of your narrative.