Dear Friend: [ <--- Notice the personalization ]ML/NJThank you for your e-mail. Please know that this is an automated response to confirm that your e-mail has been received by my Washington office.
I will respond in writing to your specific concerns as soon as possible. Please make sure you have also included your mailing address with your email. [Now isn't this a stupid comment. My email address is in the headers of the email I sent the guy. And somehow the tenses just don't seem correct for this post hoc suggestion.]
If you are in need of immediate assistance, please telephone my district office at (973) 984-0711.
To keep track of the latest developments and news, you can visit my website at http://www.house.gov/frelinghuysen/. I would also encourage you to sign up for my e-mail newsletter which you can do on the home page of my website.
Again, thank you for contacting me.
Sincerely,
Rodney P. Frelinghuysen
Member of Congress
Apparently you haven't seen this before - it's not as stupid as you think.
He's asking for your mailing address, not your e-mail address.
They do that to avoid sending paper (via USPS) to people outside their district.