Incoming E-Mail works in SharePoint 2013 Farm in general. I have 2 sitecollections with E-Mail activated document libraries. I promoted the aliases to the new farm by deactivating and re-activating the incoming E-Mail Setting in the document library Settings. Mails for any libraries in These two sitecollection stay stucked in the drop folder, other E-Mail activated lists in other sitecollections work fine.
Creating new lists in These 2 sitecollections doesn't Change the behavior. Activating libraries in other sitecollections works.
ULS doesn't Show any hint just: end a Batch processing. error in processing 1 message.
No hint in the Server Event log.
Info: 4 Server farm, 1 WFE with activated incoming E-Mail Service.