(Mono C#) SMTP Send Raw Command

Demonstrates how to send a raw command to the SMTP server after the connecting and authenticating.

Chilkat .NET Downloads Chilkat .NET Assemblies Chilkat for .NET Core Chilkat for Mono

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.MailMan mailman = new Chilkat.MailMan();

mailman.SmtpHost = "smtp.mail.us-west-2.awsapps.com";
mailman.SmtpSsl = true;
mailman.SmtpPort = 465;

bool success = mailman.SmtpConnect();
if (success == false) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

mailman.SmtpUsername = "john@example.com";
mailman.SmtpPassword = "the_password";

success = mailman.SmtpAuthenticate();
if (success == false) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

Debug.WriteLine("Authenticated!");

// Send the "EHLO" command again to get the multi-line response that includes the SMTP capabilities.
// The capabilities are the lines in the response that begin with "250-".
string responseStr = mailman.SmtpSendRawCommand("EHLO client.example.com","utf-8",false);
if (mailman.LastMethodSuccess == false) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

Debug.WriteLine(responseStr);

// A sample response:

// 250-smtp.us-west-2.mail.awsapps.com
// 250-8BITMIME
// 250-AUTH PLAIN LOGIN
// 250 Ok