(Classic ASP) Office365 Send Email from Shared Mailbox

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Demonstrates how to send email from a shared mailbox, from smtp.office365.com using OAuth2 authentication.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

' An Office365 OAuth2 access token must first be obtained prior
' to running this code.

' Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
' interactive authorizaition via a web browser.  Afterwards, the access token
' can be repeatedly refreshed automatically.

' See the following examples for getting and refreshing an OAuth2 access token

' Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
' Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

' First get our previously obtained OAuth2 access token.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set jsonToken = Server.CreateObject("Chilkat.JsonObject")
success = jsonToken.LoadFile("qa_data/tokens/office365.json")

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.MailMan")
set mailman = Server.CreateObject("Chilkat.MailMan")

mailman.SmtpHost = "smtp.office365.com"
mailman.SmtpPort = 587
mailman.StartTLS = 1

' In case of shared mailbox access using OAuth, the application needs to obtain the access token on behalf of a user
' but replace the SMTP username with the email address of the shared mailbox.

' Login using the shared mailbox email address for the username, and the access token for the password.
' See Office 365 SASL XOAUTH2 format 

' Use your Office365 email address for the SmtpUsername.
mailman.SmtpUsername = "SHARED_MAILBOX_EMAIL_ADDRESS"
mailman.OAuth2AccessToken = jsonToken.StringOf("access_token")

' Create a new email object
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Email")
set email = Server.CreateObject("Chilkat.Email")

email.Subject = "This is a test"
email.Body = "This is a test"
email.From = "MY_NAME <SHARED_MAILBOX_EMAIL_ADDRESS>"
success = email.AddTo("John Doe","somebody@example.com")

' 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 <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( mailman.LastErrorText) & "</pre>"
    Response.End
End If

success = mailman.CloseSmtpConnection()
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Connection to SMTP server not closed cleanly.") & "</pre>"
End If

Response.Write "<pre>" & Server.HTMLEncode( "Mail Sent!") & "</pre>"

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