no email sent from cb 1.9.1

Hi,
everything works last year but now no email was sent on registration, confirmation, lost password with cb 1.9.1

I am on joomla 2.5.27

Ihave ever try what I found on similar topics but nothing works.

Please can you heklp me , it's an emergency !!

Thank you

CB doesn't suddenly stop working. Check if Joomla is still able to send emails (use Joomla mass mailer). If not then chances are high your mailer configuration was changed within Joomla global configuration. Also note that Joomla will fallback to PHPMailer if SMTP fails and CB will not so if using SMTP try setting it to PHPMailer.