Continual Password Rejection for MAC on
Enthusiast - Level 2

Running Mavericks and Apple Mail.   Have AOL and Verizon e-mails configured on Apple Mail; using Verizon/Yahoo for mail.   When sending an e-mail, I'm prompted for the password once or twice before it is sent.  This only occurs with Verizon e-mail, and not AOL.  It also does not occur on my IPhone.   I think this issue has been brought up before, but I'm having a hard time finding an aswer.  I've run KeyChain First Aid by the way.