Meanwhile I have news. The isolated mail function in a php-script works. I get pop up reminders.
Using your php-script, I get echo only to "while ($line=mysql_fetch_array($result,MYSQL_ASSOC))", so the whole block downstream don't work, including the mail:
Appointment Check Current Time is 1100359263 04:21:03 PM
Do you have a hint, why the script don't works?
PS: I have now installed the 2.10