I am new to working with the Microsoft Graph API, and am currently working through an example of the sample code they provide on their website for python implementation. I have a simple function that connects to outlook mail and sends an email to a specified user. I am hoping to schedule a time to send the email for some time in the future rather than sending it immediately. I found a previous post that recommended using PidTagDeferredSendTime attribute within the extendedProperties options, but I can't seem to get it to work. Everything in the code works and sends fine until I add the "singleValueExtendedProperties" lines and then it never delivers but says it sent. Has anyone got this to work? Attached is the send mail function where I am having the issues.
def send_mail(subject: str, body: str, recipient: str):
print(recipient)
request_body = {
'message': {
'subject': subject,
'body': {
'contentType': 'text',
'content': body
},
'toRecipients': [
{
'emailAddress': {
'address': recipient
}
}
],
"singleValueExtendedProperties":
[
{
"id": "PtypTime 0x3FEF",
"value": "2022-08-01T13:48:00"
}
]
}
}
Your property definition PidTagDeferredSendTime isn't correct for the datatype it should be SystemTime eg
{
"message": {
"subject": "Meet for lunch?",
"body": {
"contentType": "Text",
"content": "The new cafeteria is open."
},
"toRecipients": [
{
"emailAddress": {
"address": "[email protected]"
}
}
],
"singleValueExtendedProperties": [
{
"id": "SystemTime 0x3FEF",
"value": "2022-08-01T23:39:00Z"
}
]
}
}
Also make sure the datetime you want to send it is converted to UTC, what you should see is the message saved into the drafts folder (as a draft) and then it will be sent at the time you specify. eg the above request works for me in the Graph explorer