SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/TroubleshootingSMTP server error: QUIT command failed"

根据提供的引用内容，"SMTP connect() failed"和"SMTP server error: QUIT command failed"是SMTP连接和SMTP服务器错误的提示信息。根据\[1\]，可以在https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting找到有关SMTP连接失败的解决方案。而\[2\]和\[3\]提供了有关SMTP服务器错误的更多信息和解决方案。请用户点击链接查看详细信息和解决方案。
#### 引用[.reference_title]
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