MOSS2007: Incoming Email

Enabling:

http://technet2.microsoft.com/Office/en-us/library/88317397-e0cb-47c7-9093-7872bc6852131033.mspx?mfr=true

Settings:

http://blogs.msdn.com/joelo/archive/2007/10/23/email-enabled-lists-and-inbound-email.aspx