Thank you for writing to me via e-mail.  If you have included your full
       name and address, and if you are in my Congressional District, you
       should receive a response via U.S. mail.  I respond via U.S. mail
       both because I want to preserve the personal touch of a letter, and
       because of the ease with which e-mails can be altered
       after-the-fact.  A hard copy, on official letterhead, and with my
       signature, ensures the permanent integrity of my response to you.
       Also, because my office receives e-mails from around the nation, I
       must limit my responses to my home district.  This ensures the
       resources of my office are devoted to my constituents.  Thank you
       very much for taking the time to contact me.