[Exim] Static Ip Help (newbie)

Hi,

This is my first email to the list.
I require some help with my exim setup. I need to allow a range of IP's
outside of my current IP address to be allowed to send emails with out
getting a 550 error. I know this is probably a quick fix but I cannot for
the life of me remember how to do it.

Any help would be greatly appreciated.

Thanks in advance
Andrew Mouawad