Hi,
you should be able to send a mail to as many ppl as you want to (theoretically). Just use the regular mail function and divide the adresses by a comma. So if you have all the mailadresses in a table, fetch an array, just store them all in a variable, then use this variable in the mail function. (i presume you want to send the same mail to a lot of users).
Like:
$yourquery = "SELECT email FROM users";
while ($row = mysql_fetch_array($yourquery)) {
$recipients = $recipients.$row[0].',';
}
bool mail (string to, string subject, string message [, string additional_headers [, string additional_parameters]])
use $recipients as "string to" refering to the function definition.
I hope that helped and actually works 😉