My S5 won't send emails from my verizon email account, which is the default email for my phone. It will send fine from gmail, but when I try to reply to messages in the verizon account, I get a "Sending Failed" message and an eternal loop from my outbox trying over and over to send the message. Does anyone know how to fix this? I took it to the Verizon store for help, and they were completely useless.