does anyone know how to fix this error?

[eransss]

Error Info

Zend_Mail_Transport_Exception: Unable to send mail. - library/Zend/Mail/Transport/Sendmail.php:137
Generated By: test, 10 minutes ago
Stack Trace

#0 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Sendmail->_sendMail()
#1 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail))
#2 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/XenForo/Mail.php(177): Zend_Mail->send()
#3 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/XenForo/Mail.php(152): XenForo_Mail->sendMail(Object(Zend_Mail))
#4 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/XenForo/Model/UserConfirmation.php(124): XenForo_Mail->send('jrudow1@aol.com', 'test')
#5 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/XenForo/ControllerPublic/AccountConfirmation.php(98): XenForo_Model_UserConfirmation->sendEmailConfirmation(Array)
#6 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/XenForo/FrontController.php(310): XenForo_ControllerPublic_AccountConfirmation->actionResend()
#7 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/library/XenForo/FrontController.php(132): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#8 /mnt/glusterfs/apache/hosting-dir/150876/user_dir/moderntank.net/community/index.php(13): XenForo_FrontController->run()
#9 {main}
Request State

array(3) {
["url"] => string(73) "http://www.moderntank.net/community/index.php?account-confirmation/resend"
["_GET"] => array(1) {
["account-confirmation/resend"] => string(0) ""
}
["_POST"] => array(5) {
["_xfToken"] => string(55) "173,1356961223,6ed9d13a52ab5995a7f2a65d270eba4cd9119c9d"
["_xfConfirm"] => string(1) "1"
["_xfRequestUri"] => string(38) "/community/index.php?register/register"
["_xfNoRedirect"] => string(1) "1"
["_xfResponseType"] => string(4) "json"
}
}​

 

[Chris D]

It usually indicates that there is an issue with your mail set up.

Check the mail set up at Admin CP > Options > E-mail Options