SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting - Using WHMCS - WHMCS.Community
Message could not be sent.Mailer Error: SMTP connect() failed. · Issue #469 · PHPMailer/PHPMailer · GitHub
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SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting - Software Support - PKP Community Forum
SMTP ERROR: Failed to connect to server: · Issue #736 · PHPMailer/PHPMailer · GitHub
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SMTP ERROR: Failed to connect to server: · Issue #736 · PHPMailer/PHPMailer · GitHub
php - I am getting SMTP ERROR: Failed to connect to server: (0) and Email could not been sent. Mailer Error (Line 301): SMTP connect() failed - Stack Overflow
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting - Software Support - PKP Community Forum
Phpmailer SMTP Error Could not connect to smtp host [100% Solved] - YouTube