submit button not redirecting

I have tested your code and it works.

helloyour mail was sent

is displayed after I hit the submit button.

Does your browser do anything when you hit submit? Does it start to load?
Do you have this in a htaccess file?

Code:

#Rule for routing all page requests through index.php
RewriteCond $1 !^(index\.php|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

And your config set to this?

PHP Code:

// Set the protocol
$protocol = 'http://';
if ( isset( $_SERVER["HTTPS"] ) && strtolower( $_SERVER["HTTPS"] ) == "on" ) {
    $protocol = 'https://';
} else {
    $_SERVER['HTTPS'] = 'off';
}
// Set the base_url
$config['base_url'] = $protocol.$_SERVER['HTTP_HOST'];

// Index File
$config['index_page'] = ''; // Blank so index.php is not added to generated URLs 


What does your post url look like in your page source?

When all fails retry with a fresh install of CodeIgniter.

Good luck!