I have basic setup(automatic mode) of incoming email setting in SharePoint 2013 box. I have setup a SMTP server in front end web server.
I see my sent email appear in the drop folder for a while and then disappear, I guess it is picked up by the timer job. However I didn't see the email in the doc library. The badmail folder also have nothing.
The ULS log have following entries:
12/22/2016 13:24:11.72 OWSTIMER.EXE (0x0E98)
0x1808 SharePoint Foundation Monitoring
nasq Medium Entering monitored scope (Timer Job job-email-delivery). Parent No 6515b0de-9156-473d-bd3c-917505d3cf27 12/22/2016 13:24:11.72 OWSTIMER.EXE (0x0E98)
0x1808 SharePoint Foundation Logging Correlation Data
xmnv Medium Name=Timer Job job-email-delivery 9772c39d-dd34-407d-b071-93b18f5cfee3 12/22/2016 13:24:11.72 OWSTIMER.EXE (0x0E98)
0x1808 SharePoint Foundation E-Mail
6871 Information The Incoming E-Mail service has completed a batch. The elapsed time was 00:00:00. The service processed 0 message(s) in total. 9772c39d-dd34-407d-b071-93b18f5cfee3 12/22/2016 13:24:11.72 OWSTIMER.EXE (0x0E98) 0x1808 SharePoint Foundation Monitoring b4ly Medium Leaving Monitored Scope (Timer Job job-email-delivery). Execution Time=2.1928 9772c39d-dd34-407d-b071-93b18f5cfee3
Drop
and then disappears, you're indeed correct when thinking the SMTP server is well-configured + the incoming email job picked it up. So, the problem may be with the address you configured with your doc lib