bugzilla发送邮件失败

报错URL: http://localhost/process_bug.cgi There was an error sending mail from 'bugzilla-daemon' to 'aaa@163.com':error when closing pipe to /usr/lib/sendmail:
修改下列参数[root@ysc ~]# vim /var/www/html/bugzilla/data/params 'mail_delivery_method' => 'SMTP',
'mailfrom' => 'admin@unihz.com',
'maintainer' => 'admin@unihz.com',
'smtp_password' => '12345678',
'smtp_username' => 'admin@unihz.com',
'smtpserver' => 'smtp.unihz.com',
'use_mailer_queue' => 'on', #邮件进队列处理，改善页面僵死的等待

[root@zhm ~]# /var/www/html/bugzilla/jobqueue.pl start #启动邮件队列处理
[root@zhm ~]# /var/www/html/bugzilla/jobqueue.pl install #写进内核，开机自动启动