How can developers ensure that their PHP scripts are securely sending emails without encountering authentication issues with SMTP servers?

Developers can ensure their PHP scripts securely send emails by using SMTP authentication with valid credentials. This involves setting the 'username' and 'password' parameters when sending emails via SMTP. By providing correct authentication details, developers can avoid encountering authentication issues with SMTP servers. 

// Set SMTP authentication parameters
$mail->Username = 'your_smtp_username';
$mail->Password = 'your_smtp_password';

Keywords

PHP email SMTP authentication security

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