You missed other articles that discussed this. Ford sent it to a Democrat in the House...and that Democrat sent it to DiFi. (Therefore - Ford avoided any criminal liability for sending a lie directly to the Senate Judiciary Committee.)
it was a letter TO Sen Feinstein. and by law it was a letter submitted to the Senate Judiciary Committee RE committee business.
doesn’t matter if a carrier pigeon DELIVERED it .
I don't think someone facing prosecution under that law can get around it by claiming: "I didn't give the letter to Feinstein. The U.S. Postal Service did."