bugfree安装好之后，对于邮箱发送功能，要设置一下邮件服务器。具体找到配置文件，在bugfree/include/config.inc.php

找到这几行代码：
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/* 8. Mail setting. */
$_CFG['Mail']['On']          = true;//开启邮箱服务 
$_CFG['Mail']['FromAddress'] = "bugfree@{$_SERVER['SERVER_NAME']}";//发送邮件的邮箱地址。 
$_CFG['Mail']['FromName']    = 'BugFree';//发送邮件名，不一定是邮箱地址的用户名 
$_CFG['Mail']['ReportTo']    = array();  // Where bug statistics message sened to. If empty， to all users. 
$_CFG['Mail']['SendMethod']  = 'SMTP';   // MAIL|SENDMAIL|SMTP|QMAIL 
 
/* 9. SMTP param setting. */
$_CFG['Mail']['SendParam']['Host']     = '';       // The server to connect. Default is localhost。这里是指的邮件服务器，如果你安装bugfree上没有邮件服务器，可以使用其他邮件服务器，比如163，地址即为stmp.163.com 
$_CFG['Mail']['SendParam']['SMTPAuth'] = false;    // Whether or not to use SMTP authentication. Default is FALSE。这里要改成true 
$_CFG['Mail']['SendParam']['Username'] = '';       // The username to use for SMTP authentication.//用户名 
$_CFG['Mail']['SendParam']['Password'] = '';       // The password to use for SMTP authentication.//密码
/* 8. Mail setting. */
$_CFG['Mail']['On']          = true;//开启邮箱服务
$_CFG['Mail']['FromAddress'] = "bugfree@{$_SERVER['SERVER_NAME']}";//发送邮件的邮箱地址。
$_CFG['Mail']['FromName']    = 'BugFree';//发送邮件名，不一定是邮箱地址的用户名
$_CFG['Mail']['ReportTo']    = array();  // Where bug statistics message sened to. If empty， to all users.
$_CFG['Mail']['SendMethod']  = 'SMTP';   // MAIL|SENDMAIL|SMTP|QMAIL

/* 9. SMTP param setting. */
$_CFG['Mail']['SendParam']['Host']     = '';       // The server to connect. Default is localhost。这里是指的邮件服务器，如果你安装bugfree上没有邮件服务器，可以使用其他邮件服务器，比如163，地址即为stmp.163.com
$_CFG['Mail']['SendParam']['SMTPAuth'] = false;    // Whether or not to use SMTP authentication. Default is FALSE。这里要改成true
$_CFG['Mail']['SendParam']['Username'] = '';       // The username to use for SMTP authentication.//用户名
$_CFG['Mail']['SendParam']['Password'] = '';       // The password to use for SMTP authentication.//密码

  =========BugFree配置实例======================

/* 8. Mail setting. */
$_CFG['Mail']['On']          = true;
$_CFG['Mail']['FromAddress'] = "bugfree@{$_SERVER['SERVER_NAME']}";
$_CFG['Mail']['FromName']    = 'BugFree';
$_CFG['Mail']['ReportTo']    = array();  // Where bug statistics message sened to. If empty， to all users.
$_CFG['Mail']['SendMethod']  = 'SMTP';   // MAIL|SENDMAIL|SMTP|QMAIL

/* 9. SMTP param setting. */
$_CFG['Mail']['SendParam']['Host']     = 'smtp.qq.com';       // The server to connect. Default is localhost
$_CFG['Mail']['SendParam']['SMTPAuth'] = true;  

// Whether or not to use SMTP authentication. Default is FALSE
$_CFG['Mail']['SendParam']['Username'] = '6449694';       // The username to use for SMTP authentication.
$_CFG['Mail']['SendParam']['Password'] = 'qqxxxxx';       // The password to use for SMTP authentication.