How can I contact customer service either by phone or email?

I am unable to insert addresses from my address book into any of the fields; to, cc, bc

How can I contact customer service either by phone or email?
Yahoo Personal Email 1-866-492-4664





Yahoo! Customer Service


866-562-7219


408-349-3300


8am - 5pm M-F (Pacific Time)


The E-Mail address for Yahoo! customer care is


cc-advoc@yahoo-inc.com