EXP Elite optin email marketing software - Version 7.51 E-mail marketing software Includes built-in autoresponders & unlimited mailing list support, broadcast personalization, built in spam checkers, newsletter management, HTML e-mail, and list managment.The future of Internet email marketing has changed. And that's why you need EXP Elite if you're promoting a newsletter, or want to stay in contact with your customers and prospects via email.