[PHP-DB] connection to smtp

[fam.paauwe]

My php mail() function failes to make a connection to my local smtp server. Which 
server is best suitable and what do I have to change in my php.ini file so that the 
mail() function will operate correctly?

Does the mail() function work without an smtp server?
Do I have to have an internet connection to use the mail( ) function?

thanx,
ufo :-)