I'm new to Magento. I've upgraded recently magento to 1.9.2 and it's not sending new order confirmation emails.
I checked email templates and they're in place (I use default magento templates from locale folder).
Exception log shows these errors:
2015-08-12T12:00:04+00:00 ERR (3): exception 'Zend_Mail_Transport_Exception' with message 'Unable to send mail. ' in /home/user/webapps/app_name/lib/Zend/Mail/Transport/Sendmail.php:137 Stack trace: #0 /home/user/webapps/app_name/lib/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Sendmail->_sendMail() #1 /home/user/webapps/app_name/lib/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail)) #2 /home/user/webapps/app_name/app/code/core/Mage/Core/Model/Email/Queue.php(239): Zend_Mail->send() #3 [internal function]: Mage_Core_Model_Email_Queue->send(Object(Aoe_Scheduler_Model_Schedule)) #4 /home/user/webapps/app_name/app/code/community/Aoe/Scheduler/Model/Observer.php(79): call_user_func_array(Array, Array) #5 /home/user/webapps/app_name/app/code/core/Mage/Core/Model/App.php(1357): Aoe_Scheduler_Model_Observer->dispatch(Object(Varien_Event_Observer)) #6 /home/user/webapps/app_name/app/code/core/Mage/Core/Model/App.php(1336): Mage_Core_Model_App->_callObserverMethod(Object(Aoe_Scheduler_Model_Observer), 'dispatch', Object(Varien_Event_Observer)) #7 /home/user/webapps/app_name/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('default', Array) #8 /home/user/webapps/app_name/cron.php(76): Mage::dispatchEvent('default') #9 {main}
My cron settings:
Aoe scheduler shows that heartbeat is older than x minutes:
I'm on shared server and I don't have access to mail logs, but my host provider checked it for me and they said there was no emails that match up time wise for orders that were placed. They also checked if cron.sh and cron.php run properly.