(Tcl) 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.

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load ./chilkat.dll

# 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.
set jsonToken [new_CkJsonObject]

set success [CkJsonObject_LoadFile $jsonToken "qa_data/tokens/office365.json"]

set mailman [new_CkMailMan]

CkMailMan_put_SmtpHost $mailman "smtp.office365.com"
CkMailMan_put_SmtpPort $mailman 587
CkMailMan_put_StartTLS $mailman 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.
CkMailMan_put_SmtpUsername $mailman "SHARED_MAILBOX_EMAIL_ADDRESS"
CkMailMan_put_OAuth2AccessToken $mailman [CkJsonObject_stringOf $jsonToken "access_token"]

# Create a new email object
set email [new_CkEmail]

CkEmail_put_Subject $email "This is a test"
CkEmail_put_Body $email "This is a test"
CkEmail_put_From $email "MY_NAME <SHARED_MAILBOX_EMAIL_ADDRESS>"
set success [CkEmail_AddTo $email "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.  
set success [CkMailMan_SendEmail $mailman $email]
if {$success != 1} then {
    puts [CkMailMan_lastErrorText $mailman]
    delete_CkJsonObject $jsonToken
    delete_CkMailMan $mailman
    delete_CkEmail $email
    exit
}

set success [CkMailMan_CloseSmtpConnection $mailman]
if {$success != 1} then {
    puts "Connection to SMTP server not closed cleanly."
}

puts "Mail Sent!"

delete_CkJsonObject $jsonToken
delete_CkMailMan $mailman
delete_CkEmail $email