No doubt, PHPMailer is a powerful and popular email-sending library for PHP that enables developers to Send Emails via Smtp or PHP’s mail() function with ease. SMTP or Simple Mail Transfer Protocol is an essential component of email communication that allows users to send and receive emails. SMTP authentication is a crucial security feature that ensures only authorized users can send emails through a server. However, there may be instances when PHPMailer fails to work due to issues such as misconfigured SMTP settings or compatibility problems with the server. …

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