If you are having problems connecting or sending emails through your SMTP server, the SMTP class can provide more information about the processing/errors taking place. Use the debug functionality of the class to see what's going on in your connections. To do that, set the debug level in your script. For example: $mail->SMTPDebug = 1; $mail->isSMTP(); // telling the class to use SMTP $mail->SMTPAuth = true; // enable SMTP authentication $mail->Port = 26; // set the SMTP port $mail->Host = "mail.yourhost.com"; // SMTP server $mail->Username = "name@yourhost.com"; // SMTP account username $mail->Password = "your password"; // SMTP account password Notes on this: $mail->SMTPDebug = 0; ... will disable debugging (you can also leave this out completely, 0 is the default) $mail->SMTPDebug = 1; ... will echo errors and server responses $mail->SMTPDebug = 2; ... will echo errors, server responses and client messages And finally, don't forget to disable debugging before going into production.