<?
mail("you@whereever.com", "Some topic", "Hello...1,2,3 testing");
?>

It doesn't send out any e-mail, no idea why. It works just great with the 3.0.* versions of php but not with 4.0 beta 1 or beta 2.

Surely this must be a well used function and such an obvious error must have been spotted long time ago...right?

Fact remains that my scripts work with php 3 but not php 4.

I have not changed the php.ini file and my setup is normal (the configuration is 
--with-mysql=/usr/local/mysql 
--with-apache=../apache_1.3.6 
--enable-track-vars 
--disable-magic-quotes 
--disable-debug
)