sending External mail

Hi, i have a couple of reports that send notifications via e-mail, and they are working fine, except that the e-mails only get to the SAP inbox of the users... I want the e-mails to go outside of SAP into our exchange server.

Is there a parameter that needs to be set when calling the function that sends the e-mail from ABAP, or is it a Basis problem?

If you need any more details, please tell me.

Thanks in advance