Same thing happened to me...I had to go in to the email settings on my Yahoo account on my phone and put the password in again. I logged on to my email on my computer first to make sure my password was working. Hope this helps! 
I cannot get my yahoo email to update since last week after changing my password. What can I do to fix this?
I have not received emails for more than a week also. What is the problem?
Same thing happened to me...I had to go in to the email settings on my Yahoo account on my phone and put the password in again. I logged on to my email on my computer first to make sure my password was working. Hope this helps!
Start a new topic or ask questions in the open forum.