Any Fix For This E Mail Problem

So, the e-mail password in my phone is correct, I know this because I entered it a good five times. Even though it's correct, and it has all the little checks to prove it, I still get this message .





It's getting really annoying, and the only way to fix it is to restart the phone, and then it will only send one e-mail and start doing that again. Any way to fix this? Thanks

 

It seems to be varying when I do it. For example, it just sent the e mails that I needed it to, even though it was telling me that the password was incorrect (it was actually correct). It's working sometimes, I guess you could say.

 

Lol, Yahoo, as seen in the picture. It happens occasionally, it's just one of those things that gets annoying after awhile though .