PHP sends messages using SMTP error cannot connenct to relay host

Using DEDECMS to customize a Send mail php file, using the dedecms comes with mail.class.php, can be sent locally, after uploading to the server, prompted cannot connenct to relay host Smtp.qq.com Error: () error:cannot send email to [email protected] online to find a lot of articles, finally solved, the problem is in the server environment configuration.

Find php.ini, see two places, one is Allow_url_fopen, this place is to be set to on, and the other is to view disable_functions, if there is fsock,fsockopen, you need to remove the two functions, Restart Apache, and then you can send the message normally.

PHP sends messages using SMTP error cannot connenct to relay host