Google Message Archiving Microsoft Exchange Journaling Configuration Guide For Exchange Server 2000 and 2003 - Manual (Page 18)

22 Message Archiving - Microsoft Exchange Journaling Configuration Guide
5. Click Next.
6. Accept the default alias PostiniArchive .
7. Verify that the Create an Exchange e-mail address check box is selected,
and then click Modify.
8. In the New E-mail Address box, select SMTP Address, and then click OK.
9. In the Internet Address Properties box, enter your archive e-mail address,
and then click OK. Click Next.
10. Click Finish.