Migrating postfix faills

The zoo moved isp, (my blog) and also did ipv6 i was getting this error

fatal: parameter inet_interfaces: 
no local interface found for x

But i could not find x, i go hunting in /var/spool and find some out of date /etc files that posfix once wanted and remove any mention but x is still there.

Then i guess its my postmulit bash script file which is looking at the older config version gah.