首先环境搭建：
1、下载安装JDK，并且配置环境变量
2、下载Apache James ，下载解压之后的目录如图
双击bin下边的run.bat批处理文件安装James 服务，提示如下信息说明安装成功：
Using PHOENIX_HOME: C:\james
Using PHOENIX_TMPDIR: C:\james\temp
Using JAVA_HOME: Phoenix 4.0. james 2.3.2.1
Remote Manager Service started plain:
POP3 Service started plain:
SMTP Service started plain:
NNTP Service Disabled
Fetch POP Disabled
安装之后如图所示：
修改E:\james-2.3.2.1\apps\james\SAR-INF\config.xml文件
将配置文件中的
········
<postmaster>Postmaster@localhost</postmaster>
···········
<servernames autodetect="false" autodetectIP="false">
<!-- CONFIRM? -->
<servername>localhost</servername>
</servernames>
中的localhost修改为自己的域名，这里假设修改为star.com，如果开通账号为zsf的话那么邮件地址就是zsf@star.com，并且将autodetectIP修改为false。修改结果如下：
·····
<postmaster>Postmaster@star.com</postmaster>
······
<servernames autodetect="false" autodetectIP="false">
<!-- CONFIRM? -->
<servername>star.com</servername>
</servernames>
找到配置项：
<mailet match="RemoteAddrNotInNetwork=127.0.0.1" class="ToProcessor">
<processor> relay-denied </processor>
<notice>550 - Requested action not taken: relaying denied</notice>
</mailet>
注释掉该配置项
找到下面的配置项，去掉注释：
<authRequired>true</authRequired>
这样的话访问邮箱就需要账号验证才行。
在控制台中输入命令行telnet localhsot 4555 进入James的控制台
提示输入Login ID和Password
Login ID 和Password在之前修改的配置文件中设置，找到节点
<account login="root" password="!changeme!"/>
root就是Login ID,可以在此处修改登录的账号密码。登录成功之后提示：
Welcome root. HELP for a list of commands
输入 help 就可以查看James的相关命令
输入 adduser liemei 123456 回车就可以添加一个新的用户，用户的邮箱就是liemei@star.com，
账号就是liemei 密码是123456。
到目前为止基本的Apache James配置已经完成，但是要向外网如163邮箱发送邮件，还有一些问题，因为James的SMTP 服务默认在 25 端口启动，POP3 服务默认在 110 端口启动， NNTP 服务默认在 119 端口启动，所以如果想要在外网正常使用需要配置防火墙允许这些端口通过，配置的位置在防火墙高级设置，添加入站规则，如图
下一步就是在路由器中配置对应的外网映射，将域名star.com对应的外网IP地址映射到邮件服务器上，端口一一对应即可。
使用C#发送邮件测试
string senderServerIp = "xxx.xx.xx.x"; //域名star.com对应的外网IP
string toMailAddress = "liushuaichao159@163.com";
string fromMailAddress = "liemei@star.com";
string subjectInfo = "Test sending e_mail";
string bodyInfo = "Hello Eric, This is my first testing e_mail";
string mailUsername = "liemei";
string mailPassword = "123456"; //发送邮箱的密码（）
string mailPort = "25";
string attachPath = "";
MyEmail email = new MyEmail(senderServerIp, toMailAddress, fromMailAddress, subjectInfo, bodyInfo, mailUsername, mailPassword, mailPort, false, false);
email.AddAttachments(attachPath);
email.Send();
发送邮件类：
class MyEmail
{
private MailMessage mMailMessage; //主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）
private SmtpClient mSmtpClient; //主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）
private int mSenderPort; //发送邮件所用的端口号（htmp协议默认为25）
private string mSenderServerHost; //发件箱的邮件服务器地址（IP形式或字符串形式均可）
private string mSenderPassword; //发件箱的密码
private string mSenderUsername; //发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）
private bool mEnableSsl; //是否对邮件内容进行socket层加密传输
private bool mEnablePwdAuthentication; //是否对发件人邮箱进行密码验证 ///<summary>
/// 构造函数
///</summary>
///<param name="server">发件箱的邮件服务器地址</param>
///<param name="toMail">收件人地址（可以是多个收件人，程序中是以“;"进行区分的）</param>
///<param name="fromMail">发件人地址</param>
///<param name="subject">邮件标题</param>
///<param name="emailBody">邮件内容（可以以html格式进行设计）</param>
///<param name="username">发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）</param>
///<param name="password">发件人邮箱密码</param>
///<param name="port">发送邮件所用的端口号（htmp协议默认为25）</param>
///<param name="sslEnable">true表示对邮件内容进行socket层加密传输，false表示不加密</param>
///<param name="pwdCheckEnable">true表示对发件人邮箱进行密码验证，false表示不对发件人邮箱进行密码验证</param>
public MyEmail(string server, string toMail, string fromMail, string subject, string emailBody, string username, string password, string port, bool sslEnable, bool pwdCheckEnable)
{
try
{
mMailMessage = new MailMessage();
mMailMessage.To.Add(toMail);
mMailMessage.From = new MailAddress(fromMail);
mMailMessage.Subject = subject;
mMailMessage.Body = emailBody;
mMailMessage.IsBodyHtml = true;
mMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
mMailMessage.Priority = MailPriority.Normal;
this.mSenderServerHost = server;
this.mSenderUsername = username;
this.mSenderPassword = password;
this.mSenderPort = Convert.ToInt32(port);
this.mEnableSsl = sslEnable;
this.mEnablePwdAuthentication = pwdCheckEnable;
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
} ///<summary>
/// 添加附件
///</summary>
///<param name="attachmentsPath">附件的路径集合，以分号分隔</param>
public void AddAttachments(string attachmentsPath)
{
if (string.IsNullOrEmpty(attachmentsPath))
return;
try
{
string[] path = attachmentsPath.Split(';'); //以什么符号分隔可以自定义
Attachment data;
ContentDisposition disposition;
for (int i = 0; i < path.Length; i++)
{
data = new Attachment(path[i], MediaTypeNames.Application.Octet);
disposition = data.ContentDisposition;
disposition.CreationDate = File.GetCreationTime(path[i]);
disposition.ModificationDate = File.GetLastWriteTime(path[i]);
disposition.ReadDate = File.GetLastAccessTime(path[i]);
mMailMessage.Attachments.Add(data);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
} ///<summary>
/// 邮件的发送
///</summary>
public void Send()
{
try
{
if (mMailMessage != null)
{
mSmtpClient = new SmtpClient();
//mSmtpClient.Host = "smtp." + mMailMessage.From.Host;
mSmtpClient.Host = this.mSenderServerHost;
mSmtpClient.Port = this.mSenderPort;
mSmtpClient.UseDefaultCredentials = false;
mSmtpClient.EnableSsl = this.mEnableSsl;
if (this.mEnablePwdAuthentication)
{
System.Net.NetworkCredential nc = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
//mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
//NTLM: Secure Password Authentication in Microsoft Outlook Express
mSmtpClient.Credentials = nc.GetCredential(mSmtpClient.Host, mSmtpClient.Port, "NTLM");
}
else
{
mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
}
mSmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
mSmtpClient.Send(mMailMessage);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
}
发送完邮件之后登陆163邮箱就可以看到已经收到了刚刚发送的邮件，如图
