(VB.NET) 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 Framework Chilkat for .NET Core

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

Dim mailman As New Chilkat.MailMan

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

Dim success As Boolean = mailman.SmtpConnect()
If (success = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


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

success = mailman.SmtpAuthenticate()
If (success = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


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-".
Dim responseStr As String = mailman.SmtpSendRawCommand("EHLO client.example.com","utf-8",False)
If (mailman.LastMethodSuccess = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


Debug.WriteLine(responseStr)

' A sample response:

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