(Visual Basic 6.0) SMTP XOAUTH2 Authentication

Demonstrates how to authenticate using an OAuth2 access token. This example assumes you have already obtained the access token and now wish to use it in an SMTP session.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

Dim success As Long
Dim oauth2_access_token As String
oauth2_access_token = "some_previously_obtained_token"

Dim mailman As New ChilkatMailMan

' Set the properties for the SMTP server, whatever they may be..
mailman.SmtpHost = "smtp.example.com"
mailman.SmtpPort = 587
mailman.StartTLS = 1

mailman.SmtpUsername = "myLogin"
mailman.OAuth2AccessToken = oauth2_access_token

' Create a new email object
Dim email As New ChilkatEmail

email.Subject = "This is a test"
email.Body = "This is a test"
email.From = "Joe Example <joe@example.com>"
success = email.AddTo("Chilkat Admin","admin@chilkatsoft.com")

' Connect to the server indicated by the SmtpHost property
success = mailman.SmtpConnect()
If (success <> 1) Then
    Debug.Print mailman.LastErrorText
    Exit Sub
End If

' Authenticate using XOAUTH2 (using the OAuth2AccessToken)
success = mailman.SmtpAuthenticate()
If (success <> 1) Then
    Debug.Print mailman.LastErrorText
    Exit Sub
End If

success = mailman.SendEmail(email)
If (success <> 1) Then
    Debug.Print mailman.LastErrorText
    Exit Sub
End If

Debug.Print "Email sent."

success = mailman.CloseSmtpConnection()