#0 src/vendor/symfony/mailer/Transport/SendmailTransport.php(120): Symfony\Component\Mailer\Transport\Smtp\Stream\ProcessStream->terminate()
#1 src/vendor/symfony/mailer/Transport/AbstractTransport.php(72): Symfony\Component\Mailer\Transport\SendmailTransport->doSend(Object(Symfony\Component\Mailer\SentMessage))
#2 src/vendor/symfony/mailer/Transport/SendmailTransport.php(78): Symfony\Component\Mailer\Transport\AbstractTransport->send(Object(Symfony\Component\Mailer\SentMessage), Object(Symfony\Component\Mailer\DelayedEnvelope))
#3 src/XF/Mail/Mailer.php(305): Symfony\Component\Mailer\Transport\SendmailTransport->send(Object(Symfony\Component\Mime\Email))
#4 src/XF/Mail/Mail.php(576): XF\Mail\Mailer->send(Object(Symfony\Component\Mime\Email), Object(Symfony\Component\Mailer\Transport\SendmailTransport))
#5 src/XF/Job/ActivitySummaryEmail.php(120): XF\Mail\Mail->send()
#6 src/XF/Job/ActivitySummaryEmail.php(73): XF\Job\ActivitySummaryEmail->generateAndSendEmail(Object(XF\Entity\User))
#7 src/XF/Job/Manager.php(275): XF\Job\ActivitySummaryEmail->run(7.98721)
#8 src/XF/Job/Manager.php(205): XF\Job\Manager->runJobInternal(Array, 7.98721)
#9 src/XF/Job/Manager.php(89): XF\Job\Manager->runJobEntry(Array, 7.98721)
#10 job.php(46): XF\Job\Manager->runQueue(false, 8)
#11 {main}