Start a Workflow via Internet e-mail

[Seiz, Gert]

Hello,
hope you can help me with my question or you have any Idea where can I read
mor about this problem.
 
I want to start a workflow or execute a work item via an Internet e-mail.
 
Scenario:
A customer is sending an Internet e-mail to his provider because he want to
make a notification request.
(SAP-Exchange on R/3  is already customized by the provider)
 
Regards
Gert