I research and found this old autoresponder script that works great -does scheduled sequential mailings, email blast and the best part is that it delivers mails right into the inbox!. I did a few tweaks on the code to make it work with current versions of PHP and MySQL. I came up with a great autoresponder you can install on your hosting server.
Autoresponders cost anything from $19 above per month. with your self
hosted autoresponder, you don't have to pay anybody!
NOTE The basic cost is this service is $15 for installation.
You need a web hosting account with a Control Panel