I am exactly in the same situation. OTRS 3.1.11 from Windows to OpenSuse. My email are not fetched at all.
Cordeos said
I deleted an old record from table process_id but these two records are always createdyou should now have a single
- PostMasterMailbox
- otrs.Scheduler
Can't create PID PostMasterMailbox, because it's already running (FETO1S194.fednet.local/1994)!