How do I turn the main sync on in my email on my samsung s5

[AC Question]

My mail with yahoo quit working so I deleted it and tried to download it again and it won't let me. It keeps saying the Authentication fails and the main sync is off. I can't find the main sync.

 

[itguyjax8430]

My mail with yahoo quit working so I deleted it and tried to download it again and it won't let me. It keeps saying the Authentication fails and the main sync is off. I can't find the main sync.

Welcome to Android Central!

Are you trying to use the Email app on the phone? Or Yahoo's email app?