/^Received:.*with SMTP/         IGNORE
/^Received:.*with ESMTP/        IGNORE
/^Received:.*with ESMTPS/       IGNORE
/^Received:.*with ESMTPSA/      IGNORE
/^X-Originating-IP:/            IGNORE
/^X-Mailer:/                    IGNORE
/^Mime-Version:/                IGNORE