(此文只针对阿里云虚拟主机)
打开文件:/app/mail/PHPMailer/class.smtp.php
搜索并查找 stream_socket_client 所在行
将
$this->smtp_conn = @stream_socket_client($host . ":" . $port,$errno,$errstr,$timeout,STREAM_CLIENT_CONNECT,$socket_context);
替换成
$this->smtp_conn = fsockopen($host, $port, $errno, $errstr);