(VB.NET) Yahoo Mail Send using OAuth2 Access Token

See more Yahoo Mail Examples

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.

' See Get Yahoo Mail OAuth2 Access Token for Desktop App 
' for sample code showing how to obtain a Yahoo Mail access token.

' In this example, our access token was previously saved to the following file which contains JSON like this:
' {
'   "access_token": "kCVQdnOdul...LHucA--",
'   "refresh_token": "AIenVXETSo0jklFBVkPS8vVm8E.Ej9ToRG.xDbDYmZ65WIs5t6CZhDrD",
'   "expires_in": 3600,
'   "token_type": "bearer",
'   "xoauth_yahoo_guid": "HGDQCVF5JB4YDOWHITQJFBHCWA"
' }

Dim json As New Chilkat.JsonObject
Dim success As Boolean = json.LoadFile("qa_data/tokens/yahooMail.json")
If (success <> True) Then
    Debug.WriteLine("Failed to load Yahoo access token file.")
    Exit Sub
End If

Dim accessToken As String = json.StringOf("access_token")

Dim mailman As New Chilkat.MailMan

' Set the properties for the Yahoo SMTP server:
mailman.SmtpHost = "smtp.mail.yahoo.com"
mailman.SmtpPort = 465
mailman.SmtpSsl = True

' The SMTP username should be the Yahoo email address of the user's account that authorized your app to send email.
mailman.SmtpUsername = "user@yahoo.com"
mailman.OAuth2AccessToken = accessToken

' 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 User <user@yahoo.com>"
email.AddTo("Chilkat Admin","admin@chilkatsoft.com")
' To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

' Call SendEmail to connect to the SMTP server and send.
' The connection (i.e. session) to the SMTP server remains
' open so that subsequent SendEmail calls may use the
' same connection.  
success = mailman.SendEmail(email)
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


' You may close the connection here.  If the connection is kept open, 
' the next call to mailman.SendEmail will continue using the already-established connection
' (and automatically re-connect if needed).
success = mailman.CloseSmtpConnection()
If (success <> True) Then
    Debug.WriteLine("Connection to SMTP server not closed cleanly.")
End If


Debug.WriteLine("Email Sent via Yahoo with OAuth2 authentication.")