I have set-up my Verizon/Yahoo e-mail account. I am able to receive e-mails but not send e-mails. My outgoing server is set up as outgoing.yahoo.verizon.net and the port defaulted to 587. Any suggestions please???
Make sure in the settings for outgoing you check login required - I don't know why, but it made them start working on mine once I checked this box.
I'm having the same issue and the sign in box is checked. My e-mail is with cox HELP!