php使用smtp发送邮件报错Cannot connenct to relay host
使用DEDEcms自定义了一个发送邮件的php文件，使用了dedecms自带的mail.class.php，在本地可以正常发送，上传到服务器上后，出现提示Cannot connenct to relay host smtp.qq.com Error: () Error: Cannot send email to XXX@qq.com 网上找了一大堆文章，终于解决，问题出在服务器的环境配置上。
找到php.ini，查看两个地方，一个是allow_url_fopen，这个地方要设置成on；另一个地方是查看disable_functions，如果后面出现了fsock,fsockopen，则需要把这两个函数去掉，重启apache，然后就可以正常发送邮件了
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