Why Isn't My PHP Mail Function Sending Emails?

PHP's Mail Function Not Completing Email Delivery

In the provided code snippet, there are several areas where potential errors may occur, preventing the mail function from completing the email delivery process:

• Server Configuration: Ensure that your web server is configured to allow outgoing email delivery. Some web hosts may block email sending for security or other reasons.
• Firewall Limitations: Firewalls can block outgoing email traffic. Check your firewall settings to make sure that the PHP mail function is not being blocked.
• Invalid Email Addresses: Ensure that the recipient email address provided in the $to variable is valid and can receive emails.
• Insufficient Parameters: The mail function requires at least three parameters: $to, $subject, and $message. Make sure that you are passing all three parameters in the correct order.
• Malformed Headers: The email headers, such as $from, may contain invalid characters or be improperly formatted. Double-check the syntax of your headers.
• Spam Filters: The recipient's email service may classify the email as spam and block its delivery. Review the content of your email and avoid using spam trigger words or phrases.

Additional Troubleshooting Steps:

• Enable Error Reporting: Turn on PHP error reporting to display any errors that may be encountered during the mail function call.
• Check Server Logs: Examine your server logs to identify any errors or warnings related to the mail function.
• Test Different Mail Servers: If using your own server, consider switching to a different mail server to rule out server-related issues.
• Use a Mail Testing Service: Services like Mail Tester can provide a detailed report on the delivery status and spam classification of your emails.

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