First you need these things:
1. A MySQL server... *
2. Some php scripts *this will send the information to the server and email to the client...*
Some good php-mysql reference is at http://www.w3schools.com/php/
If you have time, you should mess around with php on your computer, I don't know how to do it but I know there are many people who can help you get it to work...
If you don't have time, you are gonna need stuff like this:
I don't have the time at the moment to make you a custom scripts...
$con = mysql_connect("Server_IP","administrator_login_username","admin_password");
die('Could not connect: ' . mysql_error());
$result = mysql_query("SELECT * FROM TableName WHERE RowName='Data'");//For the RowName you can also put variables like $username...
while($row = mysql_fetch_array($result))
$Password = $row['Password']; /*This gets the selected Password from the row you selected and it puts it into a variable called "Password"... */
$Username = $row['Username']; /*This gets the selected Username from the row you selected and it puts it into a variable called "Username"... */
Good luck and let the Php/Mysql/ force be with you!