The Daily Dot reports that as of March 1, 2017, the FBI will no longer accept requests via email - only faxes and standard mail will be accepted for requests. While Congress has specifically pushed for agencies to accept requests in easy technological formats, such as email and online websites, the FBI is moving to techniques for receiving requests last seen in the George Herbert Walker Bush administration.
Update: The FBI claims its online portal, which currently has severe limitations on how many requests can be made and when they can be made among other things, will be updated at the time the email submission option goes away. Of course, this still limits the methods of how requests can be made even if the online portal is brought up to legal standards of the FOIA. Engadget has more on the portal changes.