Comment 5 for bug 1075351

The Akonadi developers are aware and I expect the issue to be fixed in the next time.
You can workaround that problem quite easily:
In .local/share/akonadi/db_data/postgresql.conf set
listen_addresses = ' ' to be empty instead of localhost (do not forget to uncomment the line.)
Then delete everything in .config/akonadi/akonadiserverrc apart from the [%General] section. Now akonadi will start.