Okay, so you have a Yahoo Mail account, but you switched to Gmail. However, you still recieve email at your Yahoo! Mail account, and want to auto-forward it. However, you don’t want to pay for Yahoo! Plus. (One of the reasons why Gmail is the best is free auto-forwarding and POP3 access.)
This article explains how to do it. One of the programs required is “Free with TrialPay,” where you have to take an offer from a company — however, you can cancel it later.