Contact Form not sending email - OC 3.0.3.1

OC 3.0.3.1
Contact Form not sending email, although i see the success page

emails received when there is:
-new client
-new order
-reseting clients password
-sending marketing email from backend

email is configured with smtp
there are no errors on error.log

code on information/contact.php :


if (($this->request->server['REQUEST_METHOD'] == 'POST') && $this->validate()) {
$mail = new Mail($this->config->get('config_mail_engine'));
$mail->parameter = $this->config->get('config_mail_parameter');
$mail->smtp_hostname = $this->config->get('config_mail_smtp_hostname');
$mail->smtp_username = $this->config->get('config_mail_smtp_username');
$mail->smtp_password = html_entity_decode($this->config->get('config_mail_smtp_password'), ENT_QUOTES, 'UTF-8');
$mail->smtp_port = $this->config->get('config_mail_smtp_port');
$mail->smtp_timeout = $this->config->get('config_mail_smtp_timeout');

$mail->setTo($this->config->get('config_email'));
$mail->setFrom($this->config->get('config_email'));
$mail->setReplyTo($this->request->post['email']);
$mail->setSender(html_entity_decode($this->request->post['name'], ENT_QUOTES, 'UTF-8'));
$mail->setSubject(html_entity_decode(sprintf($this->language->get('email_subject'), $this->request->post['name']), ENT_QUOTES, 'UTF-8'));
$mail->setText($this->request->post['enquiry']);
$mail->send();

$this->response->redirect($this->url->link('information/contact/success'));
}

Check your PHP error log as well as the OpenCart one. You could also check your mail server logs if you have access to them.

Have you checked the sent mail of the sending SMTP account?