How to Troubleshoot Email Delivery Issues with PHP Mail() and PHPMailer?

Debugging PHP Mail() and/or PHPMailer

This issue stems from difficulties encountered while attempting to send emails from a PHP script. The specific error message, "Could not instantiate mail function," indicates a problem with the PHP mail() function. To resolve this, verify the mail() function is properly configured on the server.

An alternative solution involves utilizing the PHPMailer class. The code snippet you provided references the class.phpmailer.php file. However, you have not included the code for importing this class into your script. Ensure you have correctly included the necessary files and configurations.

To address the concern regarding the presence of PHPMailer code, it is essential to keep track of the files you are using. If you have included the PHPMailer class in your script, its functions and variables will become available within the scope of your code.

Furthermore, consider implementing SMTP debugging to gain insights into the issues you are facing. To activate SMTP debugging, add the following code:

<code class="php">$mail->SMTPDebug = 2;</code>

Setting this to 1 will provide both errors and messages, while setting it to 2 will only display messages. The debug information will help you pinpoint the root cause of the email delivery failures.

Remember to check if the class.phpmailer.php file is corrupted. If so, download the latest version and try again. Additionally, ensure your server is configured correctly for sending emails. These steps should assist you in debugging and resolving the issues you are experiencing with sending emails using PHP Mail() or PHPMailer.

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