Ok so using the macs default Mail app and my pop settings i can receive mail no problem but cannot send. Yet on my pc withe the same settings, Outlook sends and receives no problem. Any ideas why the mac is having issues sending? 
you should use the smtp value associated w/ that service.ec1_mac said:im on a wireless network, my isp is BT Broadband.
jet3004 said:I am having the EXACT same problem with Charter email...
It was working fine, then I moved to college and now I can't send email. I can receive it but not send it...Still don't know what's to blame...ANYONE!?