E-mailer - Newsletter & Mailing System with Analytics + GEO location v1.18

The mailing system is designed for efficiently organizing and managing marketing campaigns while enabling the seamless sending of newsletters to large audiences. The program has been rigorously tested on PHP 7, ensuring compatibility with modern web environments, and is optimized to handle a robust database containing up to 500,000 email addresses. It supports advanced features like personalized email templates, batch processing, and error tracking, while maintaining backward compatibility with PHP 5.3 as the minimum system requirement.