Pls check if the mailbox that you are trying to send the mail from is not marked as Postmaster? You can do that in Email and Conferences >> Settings >> Mail and Conference Settings >> Postmaster field
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...
