Does Oregon use "electronic" signature ie fax or email as legal documents? - electronic fax

Lord of the earth, after a day through our car for 18 months, each month via e-mail. Then, literally nothing, where we have published a notice to quit voluntarily because of Reviews 3 72 hours. This was by his own words "as a formality. Of e-mails was not only accepted, but we thank him for the payment of each period of one month, no contracts, since the electronic signature. I understand that I am looking for not accept or legal advice, but rather the opinion and all harmless.