Problem sending Mail, use STARTTLS

[Timo Heister]

I have a problem sending mail to a specific smtp-server, in the documentation of my account it says i have to activate "STARTTLS" to send mails.

log.txt:
connecting to:<xxxxxx>:25[server]: 220 Welcome to Nemesis ESMTP server on <xxxxxx>
[client]: EHLO <xxxxxx>
[server]: 250-<xxxxxx> pleased to meet you
[client]: AUTH LOGIN
[server]: 250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-PIPELINING
250-8BITMIME
250-SIZE 20971520
250 HELP
[client]: MAIL FROM: <xxxxxx>
[server]: 334 VXNlcm5hbWU6

[Mike Bridge]

Hi-

Unfortunately, DotNetOpenMail doesn't provide support for STARTTLS.  I'll look at this for a future revision, but current time constraints mean it  probably won't be the near future.

-Mike

[Anonymous]

Hi,

I have modified the Smtp.SendMail() method so that it is able to handle STARTTLS command. Those codes were copied from OpenPop project in sourceforget.net.

// new property
public bool useSsl { get; set; }

public void SendMail(MailMessage msg)
{

…
                if (this.username != null && this.username.Length > 0 && this.password != null && this.password.Length > 0)
                {
                    WriteToStream(ref nwstream, "EHLO " + Dns.GetHostName() + "\r\n");
                }
                else
                    WriteToStream(ref nwstream, "HELO " + Dns.GetHostName() + "\r\n");

                CheckForError(ReadFromStream(ref nwstream), ReplyConstants.OK);

// this is the SSL codes:

                if (useSsl)
                {
                    WriteToStream(ref nwstream, "STARTTLS\r\n");

                    CheckForError(ReadFromStream(ref nwstream), ReplyConstants.HELO_REPLY);

                    // If we want to use SSL, open a new SSLStream on top of the open TCP stream.
                    // We also want to close the TCP stream when the SSL stream is closed
                    System.Net.Security.SslStream sslStream = null;
                    sslStream = new System.Net.Security.SslStream(this.tcpc.GetStream(), false);
                    const int defaultTimeOut = 60000;
                    sslStream.ReadTimeout = defaultTimeOut;
                    sslStream.WriteTimeout = sendTimeout;

                    // Authenticate the server
                    sslStream.AuthenticateAsClient(this.host);

                    nwstream = sslStream;
                }
….
}

Hope someone can merge the source code into the library.