Originally Posted by ashkev
From Outside the building I can recieve e-mails, and I can send to e-mails with the cass.lib.mi.us domain. I still cannot send to anyone other than cass.lib.mi.us e-mail accounts from outside the Main Library.
Is that the domain that is handled by your server? Then you should enable "Server requires authentication." in your email client. If you don't, and your server uses SMTP-AUTH, you can send only to domains that are on the server, not to external domains.