Each line in the option.dat file contains the setting for one option. An option setting has the form:
The option.dat file is the file specified with the IMTA_OPTION_FILE option in the IMTA tailor file (msg_svr_base/config/imta_tailor). By default, it is located in msg_svr_base/config/option.dat
For more information about the option.dat file, see Chapter Chapter 4, MTA Configuration, in Sun Java System Messaging Server 6 2005Q4 Administration Reference.