Forum Error while trying to send the mail
 

Code:
The mailing function returned an error while trying to send the mail.
The following errors were outputted by PHP when attempting to send mail:


Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: Name or service not known in [path]/includes/class_mail.php on line 747

Warning: fsockopen() [function.fsockopen]: unable to connect to tcp://:25 (php_network_getaddresses: getaddrinfo failed: Name or service not known) in [path]/includes/class_mail.php on line 747

Warning: Unable to connect to SMTP server in [path]/includes/class_mail.php on line 713
how can fix it?