I noticed this in my cron logs recently:
Execute scheduled task: Incoming email pickup (tool_messageinbound\task\pickup_task) ... started 05:30:27. Current memory use 10.8MB. Inbound Message not fully configured - exiting early. ... used 0 dbqueries ... used 0 seconds Scheduled task complete: Incoming email pickup (tool_messageinbound\task\pickup_task)
Server: Moodle 3.1.5+ (20170324) running under IIS7 on Windows Server 2008 R2 Datacenter Edition Service Pack 1, PHP Version 5.5.11
I can't find much further information on this error and its effects. As far as I can tell, mail is running correctly.. Any information will be helpful.
Another person had this issue last year and no one came forward with more info. I am hoping this will be more successful. Both for me and Bill McNutt.