I am looking for an EMAIL FORWARDING SERVICE that will INTRODUCE A
DELAY of, say, one or two hours (I assume I would be able to choose
amount the delay) before a submitted email is sent on to the
recipient's address. Does anyone know of such a service? (I am not
involved in anything deceptive or illegal, by the way.)

http://www.email-forwarding.biz/

I am not sure if this meets your needs, but it is easy and free. If
you are using Microsoft Outlook as your e-mail client, there is an
option to send a message on a particular date and time. After
composing your message, you could set a future delivery time that has
the desired delay. In the new message dialog (where you compose a
message), go to the Options | Message Options | Do not delivery before
option to set this.