private bool SendEmail(string smtpServer, int port, bool ESmtp, string username, string password, MailMessage mailMessage)
{
if (Connect(smtpServer, port) == false)//测试连接服务器是否成功
return false;
string priority = GetPriorityString(mailMessage.Priority);
bool Html = (mailMessage.BodyFormat == MailFormat.HTML);
string[] SendBuffer;
string SendBufferstr;
//进行SMTP验证，现在大部分SMTP服务器都要认证
if (ESmtp)
{
SendBuffer = new String[4];
SendBuffer[0] = "EHLO " + smtpServer + CRLF;
SendBuffer[1] = "AUTH LOGIN" + CRLF;
SendBuffer[2] = Base64Encode(username) + CRLF;
SendBuffer[3] = Base64Encode(password) + CRLF;
if (!Dialog(SendBuffer, "SMTP服务器验证失败，请核对用户名和密码。"))
return false;
}
else
{//不需要身份认证
SendBufferstr = "HELO " + smtpServer + CRLF;
if (!Dialog(SendBufferstr, ""))
return false;
}
//发件人地址
//SendBufferstr = "MAIL FROM:<" + mailMessage.From + ">" + CRLF;
SendBufferstr = "MAIL FROM:<" + username + ">" + CRLF;
if (!Dialog(SendBufferstr, "发件人地址错误，或不能为空"))
return false;
//收件人地址
SendBuffer = new string[mailMessage.Recipients.Count];
for (int i = 0; i < mailMessage.Recipients.Count; i++)
{
SendBuffer[i] = "RCPT TO:<" + (string)mailMessage.Recipients[i] + ">" + CRLF;
}
if (!Dialog(SendBuffer, "收件人地址有误"))
return false;
SendBufferstr = "DATA" + CRLF;
if (!Dialog(SendBufferstr, ""))
return false;
//发件人姓名
SendBufferstr = "From:" + mailMessage.FromName + "<" + mailMessage.From + ">" + CRLF;
if (mailMessage.Recipients.Count == 0)
{
return false;
}
else
{
SendBufferstr += "To:=?" + mailMessage.Charset.ToUpper() + "?B?" +
Base64Encode((string)mailMessage.Recipients[0]) + "?=" + "<" + (string)mailMessage.Recipients[0] + ">" + CRLF;
}
SendBufferstr +=
((mailMessage.Subject == String.Empty || mailMessage.Subject == null) ? "Subject:" : ((mailMessage.Charset == "") ? ("Subject:" +
mailMessage.Subject) : ("Subject:" + "=?" + mailMessage.Charset.ToUpper() + "?B?" +
Base64Encode(mailMessage.Subject) + "?="))) + CRLF;
SendBufferstr += "X-Priority:" + priority + CRLF;
SendBufferstr += "X-MSMail-Priority:" + priority + CRLF;
SendBufferstr += "Importance:" + priority + CRLF;
SendBufferstr += "X-Mailer: Lion.Web.Mail.SmtpMail Pubclass [cn]" + CRLF;
SendBufferstr += "MIME-Version: 1.0" + CRLF;
if (mailMessage.Attachments.Count != 0)
{
SendBufferstr += "Content-Type: multipart/mixed;" + CRLF;
SendBufferstr += " boundary=\"=====" +
(Html ? "001_Dragon520636771063_" : "001_Dragon303406132050_") + "=====\"" + CRLF + CRLF;
}
if (Html)
{
if (mailMessage.Attachments.Count == 0)
{
SendBufferstr += "Content-Type: multipart/alternative;" + CRLF;//内容格式和分隔符
SendBufferstr += " boundary=\"=====003_Dragon520636771063_=====\"" + CRLF + CRLF;
SendBufferstr += "This is a multi-part message in MIME format." + CRLF + CRLF;
}
else
{
SendBufferstr += "This is a multi-part message in MIME format." + CRLF + CRLF;
SendBufferstr += "--=====001_Dragon520636771063_=====" + CRLF;
SendBufferstr += "Content-Type: multipart/alternative;" + CRLF;//内容格式和分隔符
SendBufferstr += " boundary=\"=====003_Dragon520636771063_=====\"" + CRLF + CRLF;
}
SendBufferstr += "--=====003_Dragon520636771063_=====" + CRLF;
SendBufferstr += "Content-Type: text/plain;" + CRLF;
SendBufferstr += ((mailMessage.Charset == "") ? (" charset=\"iso-8859-1\"") : (" charset=\"" +
mailMessage.Charset.ToLower() + "\"")) + CRLF;
SendBufferstr += "Content-Transfer-Encoding: base64" + CRLF + CRLF;
SendBufferstr += Base64Encode("邮件内容为HTML格式，请选择HTML方式查看") + CRLF + CRLF;
SendBufferstr += "--=====003_Dragon520636771063_=====" + CRLF;
SendBufferstr += "Content-Type: text/html;" + CRLF;
SendBufferstr += ((mailMessage.Charset == "") ? (" charset=\"iso-8859-1\"") : (" charset=\"" +
mailMessage.Charset.ToLower() + "\"")) + CRLF;
SendBufferstr += "Content-Transfer-Encoding: base64" + CRLF + CRLF;
SendBufferstr += Base64Encode(mailMessage.Body) + CRLF + CRLF;
SendBufferstr += "--=====003_Dragon520636771063_=====--" + CRLF;
}
else
{
if (mailMessage.Attachments.Count != 0)
{
SendBufferstr += "--=====001_Dragon303406132050_=====" + CRLF;
}
SendBufferstr += "Content-Type: text/plain;" + CRLF;
SendBufferstr += ((mailMessage.Charset == "") ? (" charset=\"iso-8859-1\"") : (" charset=\"" +
mailMessage.Charset.ToLower() + "\"")) + CRLF;
SendBufferstr += "Content-Transfer-Encoding: base64" + CRLF + CRLF;
SendBufferstr += Base64Encode(mailMessage.Body) + CRLF;
}
if (mailMessage.Attachments.Count != 0)
{
for (int i = 0; i < mailMessage.Attachments.Count; i++)
{
string filepath = (string)mailMessage.Attachments[i];
SendBufferstr += "--=====" +
(Html ? "001_Dragon520636771063_" : "001_Dragon303406132050_") + "=====" + CRLF;
//SendBufferstr += "Content-Type: application/octet-stream"+CRLF;
SendBufferstr += "Content-Type: text/plain;" + CRLF;
SendBufferstr += " name=\"=?" + mailMessage.Charset.ToUpper() + "?B?" +
Base64Encode(filepath.Substring(filepath.LastIndexOf("\\") + 1)) + "?=\"" + CRLF;
SendBufferstr += "Content-Transfer-Encoding: base64" + CRLF;
SendBufferstr += "Content-Disposition: attachment;" + CRLF;
SendBufferstr += " filename=\"=?" + mailMessage.Charset.ToUpper() + "?B?" +
Base64Encode(filepath.Substring(filepath.LastIndexOf("\\") + 1)) + "?=\"" + CRLF + CRLF;
SendBufferstr += GetStream(filepath) + CRLF + CRLF;
}
SendBufferstr += "--=====" +
(Html ? "001_Dragon520636771063_" : "001_Dragon303406132050_") + "=====--" + CRLF + CRLF;
}
SendBufferstr += CRLF + "." + CRLF;//内容结束
if (!Dialog(SendBufferstr, "错误信件信息"))
return false;
SendBufferstr = "QUIT" + CRLF;
if (!Dialog(SendBufferstr, "断开连接时错误"))
return false;
networkStream.Close();
tcpClient.Close();
return true;
}
/// <summary>
/// 发送电子邮件，SMTP服务器不需要身份验证
/// </summary>
/// <param name="smtpServer">发信SMTP服务器</param>
/// <param name="port">端口，默认为25</param>
/// <param name="mailMessage">邮件内容</param>
/// <returns></returns>
public bool SendEmail(string smtpServer, int port, MailMessage mailMessage)
{
return SendEmail(smtpServer, port, false, "", "", mailMessage);
}
/// <summary>
/// 发送电子邮件，SMTP服务器需要身份验证
/// </summary>
/// <param name="smtpServer">发信SMTP服务器</param>
/// <param name="port">端口，默认为25</param>
/// <param name="username">发信人邮箱地址</param>
/// <param name="password">发信人邮箱密码</param>
/// <param name="mailMessage">邮件内容</param>
/// <returns></returns>
public bool SendEmail(string smtpServer, int port, string username, string password, MailMessage mailMessage)
{
return SendEmail(smtpServer, port, true, username, password, mailMessage);
}
public bool Send(MailMessage mailMessage, string username, string password)
{
SmtpServerHelper helper = new SmtpServerHelper();
if (helper.SendEmail(_SmtpServer, 25, username, password, mailMessage))
return true;
else
{
errmsg = helper.ErrMsg;
return false;
}
}