Sharepoint Workflow does not trigger on e-mail created List Items

I was testing a while ago the workflow and list incoming e-mail combo and found out that by default it seems that workflows does not automatically start on e-mail-enabled lists.  To verify whether this happens in your sharepoint instance you need to go to Sharepoint Powershell which you can find here (make sure run it as administrator)

and execute the following

stsadm -o getproperty -pn declarativeworkflowautostartonemailenabled

If you see the following result:

<Property Exist="Yes" Value="no" />

Then it means it indeed does not start on e-mail enabled list and you should enable that setting.  To do that just type this again on Powershell

stsadm -o setproperty -pn declarativeworkflowautostartonemailenabled -pv true

Then all should be fine