Usually, when I attempt to contact Congress people outside of my District/State, I get the message, "____ only accepts communications from constituents". So, I end up sending faxes.
Did you know that Speaker Boehner can be contacted directly? His email address is SpeakerBoehner@mail.house.gov. Of course, you want to .cc your Representative in your communication as well. In my case, it's Congressman McCotter.