(VB.NET UWP/WinRT) 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 Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

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

Dim mailman As New Chilkat.MailMan

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

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

' Create a new email object
Dim email As New Chilkat.Email

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

' Connect to the server indicated by the SmtpHost property
success = Await mailman.SmtpConnectAsync()
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


' Authenticate using XOAUTH2 (using the OAuth2AccessToken)
success = Await mailman.SmtpAuthenticateAsync()
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


success = Await mailman.SendEmailAsync(email)
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Email sent.")

Await mailman.CloseSmtpConnectionAsync()