Password reset not working, form submission not working; Email not working

Hi, 

Newbie here. Need help on the email configuration to get it working; the following email config is not working. 

$config['useragent'] = 'CodeIgniter';
$config['protocol'] = 'smtp';
$config['mailpath'] = '/usr/sbin/sendmail';
$config['smtp_host'] = 'mydomainnamehost.com';
$config['smtp_user'] = 'myemail.com';
$config['smtp_pass'] = 'mypassword';
$config['smtp_port'] = '587';
$config['smtp_crypto'] = 'tls';
$config['mailtype'] = 'html';
// $config['validate'] = TRUE;
// $config['priority'] = 3;
// $config['crlf'] = "\r\n";
$config['newline'] = "\r\n";
$config['charset'] = "utf-8";

Please advise how I can get this working. Thank you much