#smtp

#smtp

The problem is that the person asking the question is only looking at things from their own perspective. They didn't change anything, so of course nothing changed. This point of view is inherently self-centered, thinking that the only thing that matters is the sender. It demonstrates a failure to understand one of the core concepts of SMTP. Each side of a SMTP transaction pays for email.

To use PHPMailer without Composer, you need to manually include required class files. Ensure you include 'SMTP.php' and 'PHPMailer.php' before using the classes.