Senator Obama was apparently using his Senate email system. If so, the email will be in email archives in the Senate email servers.
I understand that. But, there would have to be solid probable cause to get a search warrant for a dot gov email server. If all Corsi has is printed copies of emails alleged to have been sent by Obama, that's not going to cut it. Those are so easily faked probably most people on FR could do it. My understanding is that even the hard drive that contains the original emails isn't considered proof that there hasn't been tampering. From what I recall, a computer forensic specialist must be able to examine the actual computer which received the emails to make a definite determination that at least the emails themselves aren't fake. I believe that would be required before a search warrant could be executed to obtain access to the U.S. Senate email servers.