My php scripts don't send e-mail html forms.

[CombatGod]

Is there a way to check to see if I can send e-mail out from my server. Or a way to set up an external mail server which I could use? I see there is an option to set and external mail server but I do not know how to set it up under co-domains.

Any help setting up the mail server would be appreciated.

btw, I'm using a dynamic IP. I know it's not recommended but a fixed IP is currently out of my budget.