Send php Mail not working in MAMP (non pro version)

Hi all, MAC LION 10.7.4 & latest MAMP (non pro version) I've tried various things - but php send mail not working in MAMP (non pro version) ... mail ( string $to , string $subject , string $message [, string $additional_headers [, string $additional_parameters ]] ) the same script works on a hosted server... tried this but not working... viewtopic.php?f=2&t=10722 seems like I need to add more data - somewhere in php.ini or the php sendmail script.... like authentication info of mailhost and user / pass and port etc.... maybe setting data here? --- [, string $additional_headers [, string $additional_parameters ]] - i don't know how.. I also posted this at mamp forum but there does not seem much action there... http://forum.mamp.info/viewtopic.php?f=2&t=37583&p=53515#p53515 -- Thanks - Dave