When you are at camp, you are using their internet access right?
find out from one of the supervisors, or admins what their stmp server is.
You can use it for outgoing mail still, you just need to change the stmp to their domain.
Like using 'free' internet at a cafe or airport, you can recieve mail, just can't send it.
When I use my Bell cellular modem, I have to use like stmp.1bell.com to send emails through my actual domain at blueworld. Even at home, I have to use stmp.shaw.ca instead of stmp.blueworldaquatic.com.
only other option is to use webmail.
What ISP are you using.
Ken <= fish is not my only company
