I run PHP 4 on an Apache 2 server. My Platform is windows 2000. When I use the mail function in PHP my browser hangs and so does PHP. There are no logs in the error log file.

My PHP.ini file has the following set

[mail function]
; For Win32 only.
SMTP = localhost
SMTP = 25

Can anyone help. I use the IIS smtp server by the way. Thanks in advance.

ADAM