How do I create a distribution group in exchange 2003 to receive external emails?

I need to create an Exchange group with 4 users that can receive external emails. Right now if I create a Universal Distribution group and test it from an outside email I get back an error basically saying that I do not have permissions to send to it.How do I create a distribution group in exchange 2003 to receive external emails?Open Active Directory Users/Computer.

Under Users, right click and choose NEW, then choose GROUP.

Under GROUP NAME fill in the name you want as the external email, for example, if your domain is EMAIL.COM and you want your distribution list to be NEWS@EMAIL.COM, type in NEWS under the GROUP NAME.

Make sure DISTRIBUTION is checked instead of SECURITY. Click NEXT

Make sure the box is checked for CREATE AN EXCHANGE.. , click NEXT

Afterwards, right-click and choose PROPERTIES on the new group you just created, in this case NEWS, click on MEMBERS tab, now click ADD and select all the users you want to get email for NEWS@EMAIL.COM