bugzilla配置SMTP后还是不能发邮件：报错

linux系统，bugzilla 4.21

按照官网配置SMTP；

在..\data\params设置如下参数：
maintainer :            swaiwai@qq.com
mail_delivery_method :      SMTP
mailfrom :              swaiwai@qq.com
sendmailnow:            on
smtpserver :            smtp.qq.com
smtp_username:            swaiwai@qq.com
smtp_password :          **********

提交bug时，出现下面错误提示，并且BUG提交不成功，求高手，求帮助。。。

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