Sending emails using a client such as Outlook requires that we open up SMTP port 25 on our firewall. We have decided not to do this because certain people may try to send "spam" from our library, and unfortunately, it'll look like it was coming from us.
Most ISPs, such as Road Runner, offer Web based email (for example http://webmail.cfl.rr.com). Please check with your ISP to see what their web-mail site is and use it to send and receive email while you're on our network.