XF 1.2 Server error log sending mail


Active member
Hi so i just sent an email to all users letting them know the new xf software was installed and got a server error log. Any help would be great!

Zend_Mail_Transport_Exception: Unable to send mail. - library/Zend/Mail/Transport/Sendmail.php:137
Generated By: Gav, 23 minutes ago
Stack Trace
#0 /home/window/public_html/library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Sendmail->_sendMail()
#1 /home/window/public_html/library/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail))
#2 /home/window/public_html/library/XenForo/ControllerAdmin/User.php(993): Zend_Mail->send(Object(Zend_Mail_Transport_Sendmail))
#3 /home/window/public_html/library/XenForo/ControllerAdmin/User.php(921): XenForo_ControllerAdmin_User->_sendEmail(Array, Array, Object(Zend_Mail_Transport_Sendmail))
#4 /home/window/public_html/library/XenForo/FrontController.php(337): XenForo_ControllerAdmin_User->actionEmailSend()
#5 /home/window/public_html/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#6 /home/window/public_html/admin.php(13): XenForo_FrontController->run()
#7 {main}
Request State
array(3) {
["url"] => string(60) "http://myforum.co.uk/admin.php?users/email-send"
["_GET"] => array(1) {
["users/email-send"] => string(0) ""
["_POST"] => array(10) {
["page"] => string(2) "30"
["criteria"] => string(42) "{"user_state":["valid"],"is_banned":["0"]}"
["total"] => string(4) "1646"
["from_name"] => string(31) "myforumname"
["from_email"] => string(31) "info@myforum.co.uk"
["email_title"] => string(12) "We are live!"
["email_format"] => string(4) "text"
["email_body"] => string(366) "Hey,

So the site software update is complete! It took longer than we thought but the site is now live so come and have a look around http://myforum.co.uk/ We still have a few things to sort behind the scenes but all should be working.

Please let me know if you have any problems or notice any error so i can sort them ASAP!

Have fun ;)

["_xfConfirm"] => string(1) "1"
["_xfToken"] => string(8) "********"


XenForo developer
Staff member
Was it one person or a bunch of people?

That error just indicates that the mail system rejected the mail, but it doesn't give a reason why. If it's just one user, you can likely disregard it, but if it's a lot you definitely need to try to figure out what happened. There should be logs in your /var/log/maillog file, but you'd need to be root to read it (so if it's not a VPS, your host would have to help you).