Patrick,
Thanks for your reply. I think files in the drop folder gets forwarded to Queue folder. I see some files being distributed but most are stuck in the Queue. I was never able to send an email from my corp exchange to the sharepoint even though i've setup accoding to docs. But when I add security rights to a user, (there is a checkbox to send a notification that he/she was added) this emails do reach my corporate emails. I don't have access to the AD or DNS so I have to find a different way to add the MX alias to the list. I tried a relay server but no success there.
Greatly appreciated.
Jo