如果邮箱需要ssl加密访问 请问如何用c#发邮件？

Question

如果邮箱需要ssl加密访问 请问如何用c#发邮件？已经有现成的发邮件程序
如果邮件帐户需要使用ssl加密（比如GMAIL）  应该如何修改呢

Answer 1

using System.Net.Mail;MailMessage mail = new MailMessage();                    
mail.IsBodyHtml = true;                                  
mail.SubjectEncoding = Encoding.GetEncoding("GB2312");   
mail.BodyEncoding = Encoding.GetEncoding("GB2312");      
mail.Priority = MailPriority.High;                       
mail.From = new MailAddress("user");                     
mail.To.Add("[email protected]");                        
mail.Subject = "hello";                                  
mail.Body = "hello";                                     
SmtpClient smtp = new SmtpClient(server, port);          
smtp.EnableSsl = true;                                   
smtp.Credentials = new NetworkCredential("user", "pass");
smtp.Send(mail);                                         sdk2.0

Answer 2

用jmail组件 regsvr32 jmail.dllpublic static string SendMail(string ReceiveMail,string MailSubject,string MailContent) 
{ 
jmail.Message Jmail = new jmail.Message();
Jmail.Silent = true;
Jmail.Logging = true;
Jmail.Charset = "GB2312";
Jmail.ContentType = "text/html";
Jmail.AddRecipient(ReceiveMail,"","");
Jmail.From = "***";
Jmail.MailServerUserName = "***";
Jmail.MailServerPassWord = "***";
Jmail.Subject = MailSubject;
Jmail.Body = MailContent;
Jmail.Send("IP地址",false);
Jmail.Close();
return Jmail.ErrorCode.ToString();
}

Answer 3

忘了说了，是在dos提示符下输入regsvr32 jmail.dll

Answer 4

.net 2.0中使用SslStream来进行socket操作。以下是连接及登陆的代码片断。
其他的部分请自行实现。
private static bool OnCertificateValidation(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            if (sslPolicyErrors == SslPolicyErrors.None)
            {
                return true;
            }
            return false;
        } private SslStream GetConnection()
{
            SslStream sslStream = null;
try
{
if(null == this.Host || this.Host.Trim().Length == 0)
{
ErrorEventArgs e = new ErrorEventArgs("邮件服务器地址未设置！");
                    OnSmtpError(e);
}
else
{
                    OnBeginConnect(EventArgs.Empty);
tcpClient = new TcpClient(this.Host, this.Port);
                    RemoteCertificateValidationCallback callback = new RemoteCertificateValidationCallback(OnCertificateValidation); tcpClient.SendTimeout = this.SendTimeout;
tcpClient.ReceiveTimeout = this.RecieveTimeout;
tcpClient.ReceiveBufferSize = 1024;
tcpClient.SendBufferSize = 1024; LingerOption linger = new LingerOption(true, 10);
tcpClient.LingerState = linger;                    
                    sslStream = new SslStream(tcpClient.GetStream(), false, callback);
                    ReadFromStream(ref sslStream, ref returnMsg);
                    if (CheckError(returnMsg, ReplyConstants.SmtpReplyConstants.HELO_REPLY))
                    {
                        throw new Exception();
                    }
                    sslStream.AuthenticateAsClient(this.Host);
                    if (sslStream.IsAuthenticated)
                    {
                        OnConnect(EventArgs.Empty);
                        return sslStream;
                    }
}
}
catch
{
ErrorEventArgs e = new ErrorEventArgs("无法连接到邮件服务器！");
                OnSmtpError(e);
}
            return sslStream;
} private bool AuthLogin(ref SslStream sslStream)
{
if(null != this.Username && this.Username.Length > 0 && null != this.Password && this.Password.Length > 0)
{
WriteToStream(ref sslStream, "AUTH LOGIN\r\n");
ReadFromStream(ref sslStream, ref returnMsg);
if(AuthImplemented(returnMsg))
{
                    OnBeginAuthenticate(EventArgs.Empty);
string encodedUsername = Convert.ToBase64String(Encoding.ASCII.GetBytes(this.Username.ToCharArray()));
WriteToStream(ref sslStream, encodedUsername + "\r\n"); ReadFromStream(ref sslStream, ref returnMsg);
if(!CheckError(returnMsg, ReplyConstants.SmtpReplyConstants.SERVER_CHALLENGE))
{
return false;
} string encodedPassword = Convert.ToBase64String(Encoding.ASCII.GetBytes(this.Password.ToCharArray()));
WriteToStream(ref sslStream, encodedPassword + "\r\n");

ReadFromStream(ref sslStream, ref returnMsg);
if(!CheckError(returnMsg, ReplyConstants.SmtpReplyConstants.AUTH_SUCCESSFUL))
{
return false;
}
                    OnAuthenticated(EventArgs.Empty);
}
}
return true;
}