My migrated sucefullly from POSTFIXADMIN to ISPCONFIG3
i make some php console scripts to do that.
Scripts not perfect and not highly tested, scripts make text output querys to populate ispconfig database.
I migrated some over 300 mailing account all working.
If anybody need the scripts i can send it. and explain all migration process.
i will be put it on svn as help_script to migrate POSTFIXADMIN to ISPCONFIG3.