I have Cox as my ISP, and have set up Mail on my MBP for my email client. I previously used Thunderbird but I like Mail now so that's what I'm using. When I'm at home I have no problems sending and receiving emails using Mail, but when I'm at work or a cafe with wifi, Mail (and thunderbird previously) gave me "relay" problems when trying to send emails. I looked up on the Cox help page and saw that all my settings are correct for the Smtp and pop servers, but I can't figure out how to get the outgoing mail to be sent while I'm away from the house. At work we use Cox as the ISP too but I can't send emails there either. Should I just stick to using Cox's webmail while I'm away from the house?