I can't send e-mail whether I use a client such as outlook. or even if I go directly to the site of my pop mail provider. I can recieve just fine. No one else in my team is experiencing this issue.

Can I be cheeky and ask who the POP mail provider is?

It could be your internal firewall or your ISP blocking port 25. Try this from a command prompt and see what you get:

telnet <email server name> 25

If you get a HELO back you are connected to the pop server. IF not check your firewall and see if port 25 is open.