Yahoo! Sets the Record Straight on Bounce and Bulk Folder Influxes

If you manage your own email campaigns and you've noticed your Yahoo! bounces rates to be higher than usual, then there's good news coming your way. Reach out to their Postmaster team and explain your current issues. There are 3 different forms to fill out, depending on your persisting problems... There's the Delivery Issues Form, the ISP Issues Form, and the Bulk Senders Form.

Find more info from Yahoo!'s Mail Developer Blog.